This is a small amplifier for guitar practice. At maximum volume, it's loud enough to bother the neighbors. I used it at home, but it's been gathering dust since I upgraded to a higher-class Fender amplifier. <Specifications> Size: 244(W) x 166(D) x 226(H) mm Speaker Diameter: 12cm Output: 2W Power: AC adapter (included) / 6 x AA batteries (sold separately) - dual power source Included: AC adapter, handy strap Operation: Confirmed, working properly Instruction manual and warranty are not included. The original box is quite damaged due to aging. It's being used for protection during shipping. This is a used item, so please refrain from purchasing if you are looking for a new item or are particularly sensitive to condition.