Roland AC-33RW 30-Watt 2x5-Inch Acoustic Chorus Guitar Amp - Rosewood Features - 30 watts (15 W+15 W) of natural, stereo acoustic sound through twin speakers Runs on AC power or eight AA batteries (or AA rechargeable Ni-MH batteries) Dual-channel configuration - Guitar and Mic/Line channel Reverb, chorus, and ambience effects (Ambience adds spatial, 3D-type depth to the sound)