1. First use (1) Insert the device into the car cigarette lighter, it will automatically turn on after power on and display the car battery voltage (2) Turn on the car stereo and put it in the FM radio state, select any blank FM frequency from 88.0MHz to107.90MHz. (3) FM frequency adjustment is consistent with the frequency of the car radio. 2.BT pairing 3. Adjust the FM frequency 4. Play music in TF card/U disk 5. Make and receive calls 6.Switch music source from TF card/U disk/Bluetooth device BT Version: V5.0 PD output: 5V/3A, 9V/2A, 12V/1.5A USB output: 5V/ 1 A Cigarette lighter hole: 40W'2 Total power: 100W Wireless effective distance: 10-15 meters Sensitivity: -42dB+/3db 360 Working current: 45mA (maximum) Standby current: 25mA (maximum) Working voltage: 12-24V Limit voltage: 9-26V FM frequency: 88.0MHz-107.9MHzStyle:B with remote control Colour:black Material:ABS Package Contents:1 * Car Player 1 * Remote Control Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.