Wiring: Bass: red to positive black to negative; Tweeter: each connect a 1~4.7uF electrolytic capacitor in serial at positive and negative port then connect to bass speaker cable in parallel; Supports MP3 music playing in USB flash drive MMC card and TF card; With IR remote control and AUX; Supports TF card up to 16GB; Power: 12V / 3A; Supports USB / SD card switch; Supports choose last / next song fast forward rewind volume control EQ play / pause stop single repeat mute power off choose song directly; Supports bluetooth last / next song EQ play / pause mute and power off; Supports FAT16 / FAT32; Supports music of MP1 Layer3、MP2 Layer3、MP3 Layer3; Supports MP3 music of 32~320kbps; Supports power off memory; FM radio: 87.0~108.0MHz