Roland Micro Cube Bass RX (MCBRX) is A New Prescription for Bass Tone, Power and Portability. Meet the new MICRO CUBEs small, loud, proud, and in true stereo! These little amps overachieve with serious bombast in a small body. You won't believe how much these little amps can deliver through their stereo power amps and newly developed custom speakers, four per RX. Features:- Stereo power amplifiers and four newly developed 4-inch (10cm) speakers; Eight COSM amps, six digital effects; 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); Compact body with carrying strap. Accessories included are:- Strap, Power Cord, AC Adaptor & Owners Manual.