The first timekeeper designed specifically for the band's timekeeper, TAMA's Rhythm Watch had everything a drummer needed to make sure the time was right-live and in the studio. The original Rhythm Watch featured enough volume to play with real drums, a large, easy-to-read display, a dial for quick tempo adjustments, separate volumes for quarter notes, eighths and triplets...the list went on and on.The RW105 now features a backlit display, 30 different memory settings, and up to nine different beat divisions. The only thing we didn't change was the simplicity.FEATURES:[ Tempo Range : 35-250BPM [ Tempo & Beat Memory : 30 Songs [ Beat : 0-9 [ Display : LCD Display with Back Light [ Size : 127 x 25 x 151mm (5"" x 1"" x 6"") [ Weight : 330g (11.64 oz) including Battery [ Power Supply : 9V Battery (S-006P) or DC9V 200mA Adaptor ";