Roland Cube-ST-R Cube Street 2-Channel Battery-powered Amp/Mini PA Compact, lightweight stereo amplifier with slanted cabinet design Two high-performance 6.5 neodymium speakers Battery driven (6 x AA, maximum 15-hour continuous use) Dual-channel architecture with Guitar/Inst and Mic/Line inputs 8 COSM AMPs, 6 digital effects, and chromatic tuner built in 2-band EQ, Delay/Reverb for the Mic/Line-channel