Car stereo additional functions rds radio data system usb player integrated features cd player radio usb player playback cd rrw audio formats mp3 receiver tuners mw lw amfm tuner feature eon enhanced other networks station memory 18 total output power 4 x 55 watt connections usb aux in subwoofer output pre amp out display type lcd illuminated keypad red amplifier properties high pass filter low pass filter usb ports 1 x front usb