Roland CUBE-ST Cube Street Battery-powered Guitar Combo Amplifier Black with 1 Year Free Extended Warranty 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