The RSS-225 speaker system offers improved sound quality via polypropylene drivers vs paper drivers. This fully enclosed amplified stereo speaker system has front panel controls which include a Power ON/OFF and Volume Control Switch with Power Indicator. The front panel Headphone Jack disables the internal speakers when a headphone plug is inserted, directing audio output to the headphones. A front panel 3.5mm AUX input jack overrides the rear input source allowing connection of a second source. The unit is supplied with a detachable audio cable and an external 110 VAC 60 Hz input power supply (optional 110/220 VAC 50/60 Hz input power supply).