Artec "Tino" Mini Amp Zebra Wood finish! Input, Volume, Power on/off switch, Chromatic tuner on/off switch, 4 way Drive selector, All wood surround and a 4" speaker Output power: MAX 2W RMS @ DC9V Battery: 9V Alkaline (included) Approx Size: D 3.12 " x W 6 " x H 5.4 " (inches)