describe: With FM channels, this car bluetooth FM transmitter allows you to enjoy your phone music while driving and play clearer phone navigation sounds on your car stereo. Supports Bluetooth hands-free phone calls through the built-in microphone, answering calls at the touch of a button is very convenient and ensures your driving safety. Support TF card and USB flash drive reading (maximum 64GB), can play music files in FLAC/MP3/WMA/WAV format. Dual USB ports support smart charging, automatically identify various mobile phones/tablets/mp3/mp4, provide and output 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 prevent overheating, overvoltage, overcurrent, short circuit and electromagnetic interference. DC 12-24V DC voltage input, suitable for all vehicles, suitable for most cars, trucks, off-road, etc. Specification: Screen Type: LED BT version: BLE 5.0 Memory Support: Up to 64GB Power supply mode: 12V power supply Source Category: U Disk Additional features: FM radio function, support bluetooth Memory card type: SD card miniSD card microSD card (not included) Player Category: Car MP3 Signal-to-noise ratio: 85dBA FM frequency range: 87.5-108MHz Launch distance: 5m and below The package includes: 1 car MP3 player 1*User Manual