1)Operating Voltage: DC 12V
2)FM tuner with 18 stations presets, can be up/down automatically search for radio station(AM/12，Optional)
3)Max power output: 20wX4
4)Support USB,MMC and SD card.
5)Rotary volume control, time adjustment
6)Output interface with small signal
7) Speaker Impedance: 4-8 ohm
8)LCD screen remote control receiver port
9) Playback mode swith/heavy bass options
10)AmplifierIC:TDA  7377