Overview This product is a car-type car Bluetooth MP3 player, with one tow two cigarette lighter mouth output, dual USB charging port for mobile phone charging up to 5V/3.1A, it has a built-in FM transmitter, MP3 decoding, and stereo Bluetooth wireless transmission chip, able Put the U disk, the audio or song in the phone through your car audio, and support lossless audio decoding. You don't need to modify your car, you can enjoy music while driving and use the hands-free phone to talk. Entertainment and safety Note: Double-point smoke output voltage = input voltage 12-24V (double port maximum can not exceed 100W) Specifications: Rated working voltage ---12~24V Frequency response - -20Hz ~ 15Khz Audio format---MP3/WMA/WAV/FLAC Support Bluetooth protocol---HFP/HSP, OPP, A2DP/AVRCP, PBA Bluetooth version --- V3.0+EDR Bluetooth sound processing - A2DP (Advance Audio Distribution Profile) Bluetooth transmission distance -10 ~ 15m FM transmission frequency --87.5 ~ 108.0Mhz Signal to noise ratio - 68dB Dual USB fast-charge output --5V/3.1A Double-point smoke output voltage = input voltage 12-24V (double port maximum 100W) Package Content 1 *Car cup FM transmitter