Features: 1. Support FM channels, the car Bluetooth FM transmitter lets you enjoy your phone music when driving and plays a louder and clearer phone navigation voice on the car stereo. 2. Support Bluetooth hands-free phone calling via a built-in microphone, just press the button to answer a phone call, very convenient and keeps your driving safe. Support TF card and USB flash drive reading (up to 32GB Max), can play music files in FLAC/MP3/WMA/WAV format. 3. Dual USB ports with Max. 5V / 3.1A output supports smart charging, automatically identifies all kinds of mobile phones/tablets / mp3 / mp4, and provides and outputs the best and fastest charging current. 4. Support voltmeter function, the screen will display the car battery voltage when it is turned on. 5. Built-in intelligent management chip effectively prevents over-temperature, over-voltage, over-current, short circuit, and electromagnetic interference. 6. DC 12-24V voltage input, suitable for all vehicles, applicable to most cars, trucks, off-road, etc. Note: When you hear noise, you need to tune the car radio to no channel before playing! !! !! Specifications: Name: FM Transmitter Aux Modulator Bluetooth 5.0 Handsfree Car Audio MP3 Player With 3.1A Quick Charge Screen type: LED Bluetooth Version: 5.0 Memory Support: Up to 32GB (not included) Power mode: 12V power supply Source classification: U disk Additional features: FM radio function, support for Bluetooth Memory card type: SD card, mini SD card, micro SD card (not included) Player Category: Car MP3 Player Signal-to-noise ratio: 85dBA FM Frequency Range: 87.5-108MHz Launch distance: 5m Item Size: 50*45*80mm Model Name: Stereo Bluetooth 5.0 FM Transmiter Double USB Phone charger Special Features: Handsfree Car Kit Wireless FM Transmitter Modulator Voltage: 12V Item Type: FM Transmitters Material: ABS Origin: Mainland China Certification: CE Support: Voltage display Support 1: USB Flash Playing Support 3: Wireless FM Transmitter Support 4: Handsfree Calling Support 5: 3.1A+1A Dual USB Phone Charger Features: Support FM channels, the car Bluetooth FM transmitter lets you enjoy your phone music when driving and plays a louder and clearer phone navigation voice on the car stereo. Support Bluetooth hands-free phone calling via a built-in microphone, just press the button to answer a phone call, very convenient and keeps your driving safe. Support TF card and USB flash drive reading (up to 32GB Max), can play music files in FLAC/MP3/WMA/WAV format. Dual USB ports with Max. 5V / 3.1A output supports smart charging, automatically identifies all kinds of mobile phones/tablets / mp3 / mp4, and provides and outputs the best and fastest charging current. Support voltmeter function, the screen will display the car battery voltage when it is turned on. Built-in intelligent management chip effectively prevents over-temperature, over-voltage, over-current, short circuit, and electromagnetic interference. DC 12-24V voltage input, suitable for all vehicles, applicable to most cars, trucks, off-road, etc. Package includes: 1 x Car MP3 Player FM Transmitters