Digital Metronome by KORG Portable, versatile and precise! It's a rhythm trainer you can carry in your pocket. You can set tempo by number or simply hit the tap-in button. It has 13 types of time signatures built in, so you can select from 0-7 beats, double or triple meter, triplets, and quadruplets without the middle note. Batteries included. 3.75" x 2.5"