Tune-Bot Electronic Drum Tuner Increased accuracy in drum tuning. Simply clips to the side of the drum and away you go! Attractive functional shape with rubberized black finish for improved grip. Plastic case sturdy enough for drummers hardware case or stick bag More intuitive pitch savings for up to 5 drum sets with up to 10 drums each High-frequency range - best for tuning snare drums Size approx. 4.3 x 3.1 x 3.1 inches / 2 AAA batteries required.