Description: Notes: FM transmitter Bluetooth to start at work will pause / restart, belongs to the normal phenomenon, please rest assured that the use of. Bluetooth car kit is not used for a long time, please pull out from the cigarette lighter. The machine only supports the U disk / USB2 (USB), USB1 can be used as the charging port (the most outside USB). How to use: The machine is inserted into the car cigarette lighter socket, the machine will automatically enter the state of play and start to play songs; Set the playback frequency; short press m button and according to the next song keys, set the firing frequency to the ideal value; Turn on the car radio, radio frequency set to the MP3 player with the same frequency. For example, the frequency of MP3 is 87.5MHz, then the radio frequency modulation (87.5MHz) will be able to play; if you encounter a noise, please change a frequency, use the time to avoid the local radio frequency, which can avoid interference, and achieve high clear sound quality. Player volume adjustment; direct fluctuation knob switch to adjust the volume. Specifications: •Color: Blue • Rated Working Voltage: 12V-24V •Audio Format:MP3/WMA • Mic effective range: <15feet •Transmission frequency:87.5-108.0 MHz •Dimension: 3.54x 1.38 x 3.0 inches •Micro SD Maximum support: 32G •output current: 2100MA Package Includes: 1 x Car Kit Hands-free Stereo Bluetooth FM Transmitter Modulator MP3 Player 1 x Remote Control Unit. 1 x User Manual