Roland KC-220 Battery-Powered Stereo Keyboard Amplifier w/ Instrument Cable
STEREO EFFECTS: With the KC-220's high-quality DSP effects it is easy to enhance your sound. Rated Power Output: 30 W (15 W + 15 W) (when using the AC adaptor), 20 W (10 W + 10 W) (when using the Alkaline batteries).