Finding the best fm bluetooth transmitter car battery suitable for your needs isnt easy. With hundreds of choices can distract you. Knowing whats bad and whats good can be something of a minefield. In this article, weve done the hard work for you.

Best fm bluetooth transmitter car battery

Product Features Editor's score Go to site
VicTsing (Upgraded Version) 1.8 VicTsing (Upgraded Version) 1.8" Color Display Bluetooth FM Transmitter for Car, Wireless Radio Transmitter Adapter with EQ Mode, Power Off, 3 USB Ports, 4 Music Playing, Hands-Free Calls, AUX Input
Go to amazon.com
Nulaxy Wireless in-Car Bluetooth FM Transmitter Radio Adapter Car Kit W 1.44 Inch Display Supports TF/SD Card and USB Car Charger for All Smartphones Audio Players-KM18 Nulaxy Wireless in-Car Bluetooth FM Transmitter Radio Adapter Car Kit W 1.44 Inch Display Supports TF/SD Card and USB Car Charger for All Smartphones Audio Players-KM18
Go to amazon.com
VicTsing Bluetooth FM Transmitter, Wireless In-Car Audio Adapter /w USB Port, Support AUX Input 1.44 Inch Display TF Card Slot - Silver Grey VicTsing Bluetooth FM Transmitter, Wireless In-Car Audio Adapter /w USB Port, Support AUX Input 1.44 Inch Display TF Card Slot - Silver Grey
Go to amazon.com
FM Transmitter, Doosl Universal Wireless in-Car Radio Adapter FM Modulator Music Player & Hands-Free Calls for iPhone, Android FM Transmitter, Doosl Universal Wireless in-Car Radio Adapter FM Modulator Music Player & Hands-Free Calls for iPhone, Android
Go to amazon.com
Handsfree Call Car Charger,Wireless Bluetooth FM Transmitter Radio Receiver,Mp3 Audio Music Stereo Adapter,Dual USB Port Charger Compatible for All Smartphones,Samsung Galaxy,LG,HTC,etc. Handsfree Call Car Charger,Wireless Bluetooth FM Transmitter Radio Receiver,Mp3 Audio Music Stereo Adapter,Dual USB Port Charger Compatible for All Smartphones,Samsung Galaxy,LG,HTC,etc.
Go to amazon.com
FM Transmitter, Universal Wireless In-Car Radio Adapter FM Modulator Music Player FM Transmitter, Universal Wireless In-Car Radio Adapter FM Modulator Music Player
Go to amazon.com
Nulaxy KM29 Bluetooth FM Transmitter 1.8 Nulaxy KM29 Bluetooth FM Transmitter 1.8" Color Screen Car Bluetooth Adapter with Car Battery Reading, Handsfree Calling, Support USB, EQ Mode, Black
Go to amazon.com
SCOSCHE TuneTone Universal FM Stereo Transmitter with Built-In 3.5mm Aux Cable for Cell Phones, MP3 Players, iPods and More Music Devices - Black (FMT5) SCOSCHE TuneTone Universal FM Stereo Transmitter with Built-In 3.5mm Aux Cable for Cell Phones, MP3 Players, iPods and More Music Devices - Black (FMT5)
Go to amazon.com
Bluetooth Car Kit FM Transmitter Audio Adapter Car Kit, Bluetooth in-Car FM Transmitter Mini AUX adapter with Built-in 3.5mm Aux Port for Car iPhone 6s 5 SE iPod iPad Smart Phones MP MP4 Audio Players Bluetooth Car Kit FM Transmitter Audio Adapter Car Kit, Bluetooth in-Car FM Transmitter Mini AUX adapter with Built-in 3.5mm Aux Port for Car iPhone 6s 5 SE iPod iPad Smart Phones MP MP4 Audio Players
Go to amazon.com
Bluetooth FM Transmitter for Car, Nulaxy V4.2 Bluetooth FM Radio Adapter Wireless Car Kit with QC3.0 Quick Charge, Support USB Drive, TF Card, Hands-Free, Activate Siri/Google Now - NX09 Bluetooth FM Transmitter for Car, Nulaxy V4.2 Bluetooth FM Radio Adapter Wireless Car Kit with QC3.0 Quick Charge, Support USB Drive, TF Card, Hands-Free, Activate Siri/Google Now - NX09
Go to amazon.com
Related posts:

1. VicTsing (Upgraded Version) 1.8" Color Display Bluetooth FM Transmitter for Car, Wireless Radio Transmitter Adapter with EQ Mode, Power Off, 3 USB Ports, 4 Music Playing, Hands-Free Calls, AUX Input

Feature

1.8" TFT COLOR AND LARGE SCREENDesigned for brighter and clearer display, 1.8"color screen and 360 flexible hose offer you a much wider viewing for incoming phone number, battery voltage, song name, FM frequency, connected Bluetooth device and more.
CUSTOMIZE YOUR MUSIC WITH EQ Make the best sound quality for you, this FM transmitter Bluetooth supports 5 equalizer modes including normal, rock, pop, jazz and classical when stream stereo music via TF card or U disk. Support A2DP and MP3/WMA/FLAC/AAC.
VOICE REPORT HANDS-FREE CALLS This Bluetooth FM transmitter for car will loud voice report through the car radio and show the incoming phone number for notice. It is a safe design and suits for hands-free law. CVC noise reduction enable to answer a call.
POWER OFF AND 3 USB PORTSSave your car battery : Just long press the buttons to power off and no need plug or unplug it out from your car socket every time. Support 3 USB ports: One for USB disk, other two ports can charge two devices at the same time.
4 WAYS TO STREAM MUSICS Streaming stereo musics freely in 4 ways: A: Bluetooth connection; B: U Disk(32G); C: Aux Input; D: TF Card(32G). And this FM transmitter is compatible with iPhone, Samsung, LG, Sony, Android devices, iPad, MP3 player and etc.
AUTOMATIC RECONNECTIONThe FM transmitter Bluetooth will auto-reconnect with last paired smart device(When its Bluetooth function is enabledfor the next time when it turns on. And it has low power consumption MTK chip ensures stable Bluetooth connect.
VOLUME CONTROLThis Bluetooth FM transmitter for car has the volume control. Please right rotate the call button to volume the Bluetooth car transmitter up.

Description

Description:
Dedicating to make your driving effortless and pleasant, VicTsing FM transmitter features 1.8in Larger Color Display, 4 ways to stream stereo music freely and 5 Selectable EQ Modes in the U disk or TF card mode.Larger and Clearer Color Display
Featuring 1.8TFT color screen, VicTsing FM transmitter makes you visualize information with ease, such as phone number, song name, car voltage and etc.Easy to use:
1.Simply plug the product into car cigarette socket, turn your car FM radio on, find the empty radio stations(not the local radio station) , then adjust the product frequency to the same frequency as that of the car.
2.How to adjust transmitter frequency:
Short press the CH button and rotate the knob clockwise to increase the frequecny while rotating the knob anticlockwise to decrease the frequecny..Automatic Recconection Your Devices:
The product will automatically reconnect with last paired smart device(When its Bluetooth function is enabledfor the next time when it power on. Multiple Security Protection
Built-in over-current protection, over-voltage protection, intelligent temperature control and short circuit protection, the FM transmitter effectively protects your car and device while in use. Specifications:
Bluetooth Version: V3.0
Wireless Range: 5m
FM Frequency: 87.5-108.0 MHz
Compatible Audio Format: MP3/WMA/WAV/ACC
Bluetooth Protocol: A2DP/AVRCP/HSP/HFP Package Contents:

FM Transmitter 1
Audio Cable 1
User Manual 1

2. Nulaxy Wireless in-Car Bluetooth FM Transmitter Radio Adapter Car Kit W 1.44 Inch Display Supports TF/SD Card and USB Car Charger for All Smartphones Audio Players-KM18

Feature

1. THE BEST: Consolidated for customers the best FM Transmitter on the market the Nulaxy KM18 won the market for its superior quality and reliability.
2. GREAT ADVANTAGES: Compatible with most devices on the market. Play your favorite songs on your car stereo through Bluetooth, TF Card, Aux Cable. Advanced noise reduction technology will ensure quality, crystal clear sound.
3. BIG LCD DISPLAY: 1.44 inch screen to better visualize phone calls, music, car battery voltage. The ideal screen size to assist you in driving safe without disturbance.
4. TECHNOLOGY IN YOUR CAR: 1) Bluetooth connection; 2) Answer phone calls with the press of a button; 3) Voltmeter function to monitor the quality of your car battery; 4) 3 different ways to play music in your car, and more.
5. SAFETY FUNCTIONS: Safety first. KM18 is equipped with a voltmeter to show you the condition of your car battery. Voltage should be between 13.2V to 14.7V when your car is on and moving. 12.2V to 12.8V when your car is parked and ignition is off.

Description

Nulaxy KM18 is the best selling FM transmitter on the market. It has been consolidated by uniting quality and high technology.

The functions that the KM18 adds to your car without any type of installation or wires is incredible. With our device you bring your classic car into the modern age without any change to its style and without damaging the originality of your car.

Functions:

1) answer calls safely with one click;
2) listen to music from your phone, MP3 Player, tablet, laptop, TF card and connected devices via aux cable in the stereo of your car;
3) control the quality of your car battery with the voltmeter function;
4) charge your devices through the secure USB port;
5) LCD screen with ideal size to view your telephone calls, music, and other information with ease
Add all these functions with just one device!

Modernize your car in a simple and safe way!

Nulaxy, driving you safer and better.

3. VicTsing Bluetooth FM Transmitter, Wireless In-Car Audio Adapter /w USB Port, Support AUX Input 1.44 Inch Display TF Card Slot - Silver Grey

Feature

Wide Compatibility: VicTsing wireless in-car Bluetooth FM Transmitter is well compatible with iPhone 8,iPhone 8 plus, iPhone X, iphone 7 iphone 7 plus, Samsung, HTC, Blackberry, Sony, Tablet and iPad etc.
1.44'' Large LCD Backlight Display Screen: 1.44 inches screen provides clear display: song name, incoming phone number and voltage of the car battery.
Crystal Sound and Memory Function: Adopted advanced interference and noise cancellation technology - CVC technology creates full duplex sound and suppresses noise and wind. Our factory had improved the using experience to reduce interference. Also, our FM transmitter could automatically connect the next time if had been connected before.
Faster Charging STATION: Comes with a 5V-2.1A charging port which can charge most USB devices, better charging performance!( Unable to read USB sticks )
More Surprises: Firstly,Supports hands-free calling with microphone; Secondly, supports TF/Micro SD memory card in FAT format up to 32G; Thirdly, supports A2DP; Fourthly, supports MP3/WMA/FLAC format; support AUX output and input.

Description

Goose Neck Design and 1.44 LCD Display Screen
Flexible metal hose, Convenient to adjust its direction.
Large LCD Screen shows the incoming phone number, current song's name and the voltage of the storage battery clearly.
Easy Installation, Plug and play, Easy to use.

Memory Function
Fast Bluetooth pairing. Once paired, the FM transmitter will automatically connect with the last paired smart device when turned on next time.

Clear Sound and Hand-Free Calling
Adopted advanced interference and noise cancellation technology - CVC technology creates full duplex sound and suppresses noise and wind. Take hands-free calls for pleasurable driving experience!

Specifications:
Bluetooth Version: V3.0 + EDR
Effective Bluetooth Range: 10 meters
FM Frequency: 87.5MHz - 108.0MHZ
Working Voltage: 10V~24V
Audio Input/Output: 3.5mm audio interface
USB Charging Port: 5V/2.1A
Compatible Phone Models: Compatible with iPhone 8,iPhone 8 plus, iPhone X, Samsung, HTC, Blackberry, Sony, Tablet and iPad

NOTE:
1.Please do not violently rotate the head part when using it (the rotation angle shall not exceed 90).
2.Tune it to an unused frequency.
3.The max input & output current of the transmitter varies with charged devices, due to charged devices are able to limit output current automatically.

Package Included:
1x Bluetooth FM transmitter
1x User Manual
1x Audio Cable(1m)

Warranty:
60 days money-back and 12-month, worry-free Guarantee

4. FM Transmitter, Doosl Universal Wireless in-Car Radio Adapter FM Modulator Music Player & Hands-Free Calls for iPhone, Android

Feature

FM Transmitter, compatible with iPhone, iPad, iPod, Samsung, HTC, MP3, MP4 player and most devices with 3.5mm audio jack.Work with iphone 7,8,it need contact with lightning to 3.5mm adapter.
Internal 300mAh rechargeable battery, it can continuous play for 10 hours. You can enjoy your favourite music during your trip without any worries.
Supports the last FM frequency memory function, and uses PLL Phase-lock Technology to makes sure the stable output in all circumstances.
Supports hands-free phone conversation through the car stereo for safe driving.
Built-in digital tube display, easy to read and won't cause distraction in car; Left and right buttons to adjust FM frequency, convenient to use.

Description

Doosl FM Transmitter

Features:
Listen to your favorite music on your car stereo
Easy-to-read digital display
Convenient to control
The last FM frequency memory function
Built-in soft light, will not cause distraction in car
Hand free calling for safe driving
300mAh rechargeable battery, up to 10 hours playback

Specifications:
Effective Range: approx. 15ft
Frequency Range: 88.1-107.9MHz
Power Supply: inner 300mAh Li-Battery charging via Micro USB cable
Operation Time: up to 10 hours (built-in battery) music playback
Charging InputDC 5V
Dimensions: 62*25*14 mm

Package includes:
1 x Doosl FM Transmitter
1 x User Manual
1 x 18 months Warrenty Card

FAQ:
1 How do I run the Doosl FM Transmitter?
Simply operate the FM transmitter by following three steps:
1. Turn on your car stereo and select a blank and clear frequency which is without any interference from 88.1-107.9MHz.
2. Connect the Doosl FM Transmitter with your device via 3.5mm audio jack, and adjust to the same frequency as the car FM radio.
3. Now enjoy your favorite music!

2 must often changed channels for not sizzling?
1. Be sure to find empty stations manually or websites such as Radio-Locator.com and SiriusXM.com. Just type in your zip code or lieu.Essayez each station to determine which one offers the best sound quality.
2. Make sure the volume is good, the volume to about 3/4 seems to work best with FM transmitters.
3. Under the law, we do not allow to improve the signal, it is more difficult to find an empty station in the city.

5. Handsfree Call Car Charger,Wireless Bluetooth FM Transmitter Radio Receiver,Mp3 Audio Music Stereo Adapter,Dual USB Port Charger Compatible for All Smartphones,Samsung Galaxy,LG,HTC,etc.

Feature

DUAL USB CAR CHARGER : 2 USB charging port to charge most USB devices.Input 12v/24v,1A port with USB reading and charge function;smart 3.1 A charge port which can intelligently identify android or iPhone devices and charging.
BLUETOOTH AND MORE COMPATIBILITY : Wireless Bluetooth FM transmitter adapter for car radio/cassette,Transfer Calling / MP3 Music / Cellphone Voices to car radio speaker.(FM range from 87.5 to 108 Mhz). 5% every hour low power consumption when use bluetooth play music. Mobile navigation,Voice broadcast . Compatible for iPad,iPhone 8,x,7/ 7 Plus, 6s/ 6s plus, 6/ 6 Plus,Samsung Galaxy ,Google,LG,HTC Huawei Smartphones and device with Bluetooth.
HANDS FREE FUNCTION : Built-in Microphone,Switch to Hands-free mode automatically from music playing status when receiving calls.Answer/Reject/Hand up/Recall all in one key.
CAR BATTERY VOLTAGE FUNCTION : Show 3 seconds voltage when plug into the cigarette port.Always keep battery state of health.Then it turn to automatic play mode.
MUSIC PLAYING FUNCTION : Support Bluetooth Music/ USB Disk/ TF Card / MP3/WMA player. With anti-interference performance and noise suppression (CVC) technology.Listening to music while charging.Automatically connect memorized paired when power on.12-month worry-free Guarantee!

Description

Bluetooth Handsfree Car Charger,FM Transmitter&Music adapter,3.1A Dual USB Port
1.Dual USB :
One is 1A, can charge small screen cellphone,camera and read USB data.Please use pure charge line when use this one charging.
Another is 3.1A, can charge for ipad, big screen cellphone etc.
Input voltage: 12-24V,Output voltage : Max 5V DC/3.1A

2.Frequency Connect:
The device FM frequency is 87.5-108MHz.Please turn car radio channels to one of Frequency 87.5-108.0Mhz.Then plug the device, make sure the car charger keeps the same frequency to the car radio channels:

1.Choose an blank and clear channel in the car audio.
2.Long press the FM transmitter answer key until the LED display flashing.
3.Turning the answer knob adjust the same channel at FM transmitter.
4.Short press the answer key to fix the channel.
5.Connect phone bluetooth or insert the USB/TF card, FM Transmitter will start to play.
Please repeat above steps if has noise interference in the radio.

3.Bluetooth Function :

1.Power on the device, there is a prompt voice : Bluetooth is ready to pair.
2.Turn on smart phone Bluetooth search the name of HY82.
3.After connected, there is a prompt voice Bluetooth connected successfully.
4.Bluetooth function can transfer music from phone to car speakers or answer phone handsfree.

4.Music Function: Please noted the priority play sequence is Bluetooth>TF card>USB

5.Car Battery Voltage Function : For 12V /24V car, voltage display of car battery under 11.5V /23.1V or higher than 14.9V/27.3V means car battery issue.

Features:
1.Weight :45G
2.Screen : LED
3.Support TF card/ USB:32GB
.Working condition:0-60 degree
5.Transmitting distance :< = 5 meter

Package inlucde:
1 x Car Charger
1 x Manual

Warranty:45 days money-back and 12-month, worry-free Guarantee

6. FM Transmitter, Universal Wireless In-Car Radio Adapter FM Modulator Music Player

Feature

Easy to Use: turn on the Bluetooth FM Transmitter, and connect with the radio at the same frequency and then pair your phone/audio player with the modulator via Bluetooth.
Bluetooth FM Transmitter: featuring Bluetooth 4.1 technology, the wireless FM transmitter automatically selects free frequency (range from 87.5 to 108 MHz) without interference while music playing.
High Compatibility: the in-car radio adapter works great with most Bluetooth enabled devices, such as iPhone, iPad, iPod, tablet, and android smartphones.
Long Battery Life: features a built-in 700mAh rechargeable battery that supports up to 10-hour continuous playing. You can enjoy your favorite music during trip without any worries.
Friendly Design: portable and easy to charge with a USB port; support to memorize the last FM transmitting frequency.

Description

Doosl FM Transmitter
Doosl FM Transmitter is developed base on DSER107, one of the most popular car kit. With Bluetooth 4.1 Technology, The New DSER106 is even more stable and clearer. Bulit-in 700mAh lithium battery support UP to 10-hour continuous playing, equips with one micro USB charge port and High Compatibility of bluethooth device, you can enjoy fantastic music journey while your in-car travel any time.

Product Specifications:
FM Frequency: 87.5MHz - 108.0MHZ
Bluetooth Version: V4.1
Bluetooth Range: Up to 30 feet
Power Supply: 700mAh Li-polymer Battery
Charging Input Voltage: DC 5V
Charging Time: 2 hours
Operation Time: up to 10 hours
Dimensions: 70*30.5*19.5mm
Net Weight: 35g

Package Contents:
1. Bluetooth FM Transmitter*1
2. Micro USB Cable*1
3. User Manual*1
4. 18 months Warranty Card*1

User Guide:
1. Turn on your car stereo's Volume and select a black and clear Frequency (Important)
2. Turn on Doosl Bluetooth FM Transmitter, Control both FM transmitter and the car radio at the same frequecny(Frequecny range from 87.5 to 108Mhz)
3. Open mobile bluetooth,Connect to device: DSER106
4. Play mobile music and enjoy travel

7. Nulaxy KM29 Bluetooth FM Transmitter 1.8" Color Screen Car Bluetooth Adapter with Car Battery Reading, Handsfree Calling, Support USB, EQ Mode, Black

Feature

[UPGRADED LANDSCAPE SCREEN]: KM29 with 1.8" TFT color display screen and buttons offers a wider visual interface for more information. Output QC3.0 fast charge port and 5V/2.4A USB port; rotate the gooseneck 350-degrees for a comfortable viewing angle.
[Multi-Functional]: Supports incoming call announcement, fast-forward & fast-backward, 4 music input sources, and 5 EQ play modes; The Nulaxy KM29 has a built-in microphone and supports hands-free talking and private calls.
[Crystal Clear Music from 4 Sources]: Supports Aux/ Bluetooth/ USB/ TF Card. KM29 car radio transmitter adopts advanced interference and noise cancellation technology - CVC technology creates full duplex sound and suppresses noise and wind.
[Extra Features]: Plug-in or press any button to power on. Smart QC 3.0 USB charges compatible devices up to 4x speed of the conventional car charger. Built-in over-current, over-voltage, intelligent temperature control and short circuit protection.
[Safety Functions]: Safety first. The KM29 is equipped with a voltmeter to show you the condition of your car battery. Voltage should be between 13.2V to 14.7V when your car is on and moving. 12.2V to 12.8V when your car is parked and ignition is off.

Description

Nulaxy KM29 is the first one with upgraded landscape screen design under Nulaxy brand, which has been consolidated by uniting quality and high technology.
1) answer calls phones safely with one click;
2) listen to music from your phone, MP3 player, tablet, laptop, TF card and connected devices via aux cable in the sound of your car;
3) control the quality of your car battery With Our voltmeter function;
4) charge your devices through the smart QC3.0 USB port up to 4x Speed of the conventional car charger;
5) ideal size of 1.8 TFT color screen to view your telephone calls, music, car battery voltage and other information with more comfort and quality.
bring your car to new generation in a simple and safe way!
nulaxy, driving you safer and better.

8. SCOSCHE TuneTone Universal FM Stereo Transmitter with Built-In 3.5mm Aux Cable for Cell Phones, MP3 Players, iPods and More Music Devices - Black (FMT5)

Feature

MULTIPLE CHANNEL OPTIONS - 20 different transmitting frequencies available and updated design ensure a great audio quality
LOW PROFILE AUX CABLE - Slim Aux plug fits into any Ipod, phone or music device even with protective cases
ON/OFF SWITCH - Included On/Off conserves battery life when not in use, device switches to standby when not in use
USE ANY AUX DEVICE - Plays with any device using a standard 3.5mm Aux output including iPods, MP3 Audio devices and most Smart Devices through your car stereo
BATTERY POWERED - Transmitter is powered by 2 AAA batteries and has a continuous run time of 15 hours and up to 45 days on standby mode
BUY WITH CONFIDENCE: Backed by Scosche's Lifetime Tech Support and 3 Year Warranty

Description

Play any music through your car's radio from your phone, Ipod or MP3 player when Bluetooth or Aux ports are not available. Featuring 20 different transmitting frequencies, you can listen to your music regardless of your location or signal strength. The TuneTone FM transmitter is designed to work with your car stereo and is compatible with all types of stereos with FM radio receivers. Just plug in the transmitter to your device, set the channel on the TuneTone device, set your stereo FM channel to match the TuneTone and hear your music play through your car stereo. This transmitter lets you add functionality to your car's stereo system and gives you the ability to play any music as you please. Requires two AAA batteries (not included). Included On/Off switch helps conserve battery life when not in use.

9. Bluetooth Car Kit FM Transmitter Audio Adapter Car Kit, Bluetooth in-Car FM Transmitter Mini AUX adapter with Built-in 3.5mm Aux Port for Car iPhone 6s 5 SE iPod iPad Smart Phones MP MP4 Audio Players

Feature

UNIVERSAL WIRELESS FM TRANSMITTER - This FM transmitter eliminates the need for an audio jack or Bluetooth in your car audio system - just plug it into your phone or MP3 player and turn on the radio!
QUITE EASY USE - Insert the 3.5mm plug into your device just as you would a pair of headphones. Turn on the transmitter and set it to an FM frequency that's not in use in your area. Set your car radio to that frequency and you'll hear the music! The transmitter will play all audio from your phone, so you can use it to make hands-free calls as well.
MINI USB CHARGING - Charge the transmitter from any USB port with the included cable. The battery has a long standby time, so you'll get plenty of use between charges.
DIGITAL DISPLAY - The transmitter has a digital display that shows the FM frequency and the battery level for easy use.
INDUSTRY LEADING CUSTOMER SUPPORT - We're faithful with this item and willing to assure every purchased order with 90 days money back. You could always write us email with any issues or suggestions.

Description

This mini FM Transmitter works with any 3.5mm audio device. It is perfect to use at in car. Simply insert the FM Transmitter into the audio socket of your device (smartphone, tablet, or mp3 player, any device with 3.5mm audio jack) and adjust the FM transmitter to an FM radio signal which is not occupied by a local broadcast. Now you can play your music through your FM radio! Also when calls come in you can answer them hands free through your car speaker. The digital display shows the frequency and battery level. Lastly, with a built-in rechargeable battery, this FM transmitter can be charged by most USB power sources.

SPECIFICATION
Output Voltage: 50.1V
Battery: 100 mAh
FM Frequency: 87.5-108.0MHZ
Frequency Response: 100-15000Hz
Transmission Distance: 5 meters
Storage Temperature: -4F-120F
Operating Temperature: 10F-100F
Size: 2.36"1.46"0.39" (LWH)
Weight: 0.55oz
Package Size: 5.02"3.15"0.79" (LWH)
Package Weight: 1.5oz

Package Included:
1 * FM Transmitter
1 * USB Charging Cable

10. Bluetooth FM Transmitter for Car, Nulaxy V4.2 Bluetooth FM Radio Adapter Wireless Car Kit with QC3.0 Quick Charge, Support USB Drive, TF Card, Hands-Free, Activate Siri/Google Now - NX09

Feature

High Quality: Designed with digital display, it can detects and displays the voltage of car battery after power on. Featuring Bluetooth 4.2 technology, better anti-interference performance, Nulaxy NX09 ensure you a safer drive and better life.
Hands Free Call: Built-in microphone with Echo Cancellation and Noise Suppression technology, it will automatically switch from music playing to hands-free talking when answering a phone call. Also it supports hang up/ reject/ redial the last number.
Excellent Stereo Sound: With stable fm signal, it can stream Bluetooth phone to car stereo system through FM radio. The led light will be switched by Red/ Green/ Blue/ Yellowish Green/ Purple/ Cyan/ Silver White or enter into breathing lighting mode.
Dual USB Interfaces: One USB port with music icon is for USB music playing, the other QC3.0 USB charger compatible devices up to 4x speed of the conventional car charger. Enjoy in-car stereo streaming and charge your smart device at the same time.
Activate Siri/ Google Now: Supports TF Card and U disk (up to 32GB). NX09 also can activate Siri or Google Now if long press the "Previous" for 3 seconds. Besides, it will automatically connect to its memorized paired Bluetooth device when power on.

Conclusion

All above are our suggestions for fm bluetooth transmitter car battery. This might not suit you, so we prefer that you read all detail information also customer reviews to choose yours. Please also help to share your experience when using fm bluetooth transmitter car battery with us by comment in this post. Thank you!
Alyssa Salazar