There are 2 models optional,different model with different interface and appearance, please choose suitable model before purchase: （1）DC 12V No Amp：DC 12V，No Amplifier （2）DC 5V-25V 160W：DC 5-25V,2*80W Amplifier Features: 1. Bluetooth version is version 5.1 2. Music format: MP3 / FLAC lossless format music 3. Radio FM frequency: 87.5-107.5 MHZ 4. Support function introduction: support MP3 / USB / TF / LINE IN / FM / BLUETOOTH / remote control 5. Automatically support USB / TF / Bluetooth / FM / AUX switching. Prompt and convert to cable (signal sound or English voice optional) 6. Support music in MP3 / WMA / WAV format. MP3 songs 32-320kbps, WAV / WMA is 1411kbps or below 7. Support USB / card switching, music, next song, volume control, EQ, play / pause, stop, mute, shutdown, directly select songs. 8. Support Bluetooth previous song, next song, volume control, play / pause, mute. 9. Support power and storage function: turn off the storage before playing the song, and can store the volume to the current position. Breakpoint memory (in playback mode The first time you restore the U disk or TF card will play the breakpoint memory for the first time when the power is cut off after about three seconds) Package includes: 1 x Decoder 1 x Remote control (without battery)