Play from USB flash drives and TF cards. Bluetooth A2DP technology for transferring audio and high quality stereo music from your mobile phone to your car stereo supports HFP/HSPOPP,A2DP/AVRCP, Bluetooth protocols Bluetooth hands-free function with DSP cancellation USB port for charging mobile phones, maximum 3.1A charging current Suitable for all kinds of voltage car use Rated operating voltage:12- 24V Consumption work rate:0.5W Operating temperature:10-70 degrees Operating Temperature:0- 90% Frequency response:20Hz- 15Khz Audio :MP3 Signal to Noise Ratio:68dB Bluetooth version:v5.0+ Bluetooth sound processing sound:A2DP Bluetooth transmission distance:10- 15m FM transmitting frequency:87.- 5- 108.0Mhz How to use the MP3 in the car. 1.Turn on the radio in the car and tune it to an idle frequency (. a frequency with no local broadcast) 2.Plug the product into the car lighter socket and set the frequency of the product to the same frequency as the radio just now 3.Insert the memory card or U disk with downloaded into the machine, or search for the Bluetooth configuration of the product by Bluetooth on your mobile phone 4.So that the machine can automatically play the music in the memory card or U disk or mobile phone Colour:Black Material:plastic Package Contents: 1 * Bluetooth in car Only the above package content, other products are not included. Note: Light reflection 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.