This is the original US Blues Round Guitar Amp. Each amp is battery operated and comes with a bonus AC adapted at no additional cost. This practice amp packs a punch with a 4 watt 3" speaker, overdrive switch, volume and tone controls, metal speaker grille and headphone output jack. The amp features rubber bumpers on the bottom and 2 strap lock knobs on each side to attach a carry strap (not included) such as a guitar strap. Takes 1-9 volt battery or use the included AC adapter. Great at the beach, school, park or anywhere you want to play. Only available in Pink.