Roland Micro Cube RX Guitar Amp Stereo power amplifiers and four redesigned 4" (10cm) speakers Eight COSM amps, six digital effects, and chromatic tuner built in Rhythm Guide function for practical rhythm training Stereo AUX input for CD/MP3 player, Phones/Recording out Battery driven (6 x AA, up to 13-hour continuous use), AC adaptor included Compact body with carrying strap