1. Bluetooth, FM audio transmission. 2.Support QC3.0, QC2.0, PD, , , BC1.2, 2.4A and other charging protocols. 3.Support WMA , MP3, WAV, , FLAC music formats. 4. Support Bluetooth phone, voice, music, navigation. 5. Support output over-voltage protection, short-circuit protection, over-current protection, over-temperature multiple protection. Battery voltage real-time monitoring display, flashing low voltage alarm. Automatic connection back. Support U disk, TF card peripherals. EQ can be adjusted. Music synchronized display. Support breakpoint memory. Bluetooth version: Version 5.0FM transmission frequency: 87.5MHz-108.0MHz Bluetooth transmission distance: less than 10MPD port output: 5V/3A,9V/3A,12V/2.5A(30W) USB port (orange) output:5V/3A,9V /2A, 12V/1.5A(18W) USB port (Bluetooth) output: 5V/1AI input voltage: 12V-24VU disk / T-card capacity: max 32GB Music: MP3/WMA/WAV/FLAC/Rated working voltage: 12V-24V Limit working voltage: 8 -32VWorking temperature:0-60 degrees Battery voltage accuracy:error 1VSignal-to-noise ratio:Greater than 60dBDistortion:Less than 0.1%Frequency response:20Hz-20KhzLeft and right channel separation:Greater than 60dBAir effect distance:Greater than 60dBAir effect.microphone. Transmission Distance: 2MC Color: Black Material: Plastic Package Contents: 1 * Car Bluetooth Only the above package contents, 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. Thing. The allowed measurement error is +/- 1-3 cm. Thank you