This mousepad has an integrated electronic drumpad that allows you to play eight real percussion sounds using only your fingers. The mousepad reproduces bass and snare drum sounds, two rack toms, a floor tom, hi-hat, crash, and ride cymbals. The MP3 player input enables you to play drum solos over any song from your digital music library. A demonstration mode accompanies four preset beats, and you can record up to 30 of your own rhythms. The device has separate volume and tempo controls and a headphone jack. Includes four AAA batteries. 9" L x 8" W x 2 1/2" H. (8 oz.)