Product Introduction  This device is a Bluetooth MP3 player developed for car - used , which equipped with professional high - performance Bluetooth module and MP3 decoder chip . 1. It can play and transmit the music from TF card to car stereo via FM radio signal . 2. It can transmit your mobile phone's music to car stereo via Bluetooth . 4. It can also be used as a hands - free car kit during l driving . 5. This device transmits signal by wireless method , no need to modify anything in car . It can be used both as the music player in entertainment purpose or hands - free car kit in safety purpose during driving . Features: This product adopts the FM ful frequency wireless transmission technology , whichcan read the mobile phone directly . The audio files in terl the Bluetooth / TF U disk . Support Bluetooth audio playback and Bluetooth exemption A multi - function vehicle mounted MP3 with function of charging and charging . 1. Support Bluetooth music / TF Card / U disk play , support Bluetooth hands - free cal . 2. The LED screen can display frequency points , song serial numbers and working status information . 3. Support for power cut memory function  4. Fine structure design , piano paint appearance 5. Equipped with on - board charging function , output 5V-2.4A, which can charge mobile devices. Package Included: 2x Bluetooth FM transmitter