This music metronome can ensure that your playing pace is right and accurate. Suitable for guitar, piano, Erhu and any musical instrument you play. It is a very professional music accessory. You deserve to have one. Features -Color:Purple -Material:ABS -Size:6.93X4.46X10.46cm/2.72X1.75X4.11in -Power supply:USB cable(included) or 3pcs AAA battery(not included) -Perfect combination of digital and classical: This metronome has the unique pyramid shape and is popular with most musicians. -This electronic metronome has an accurate and easy-to-read digital LCD display that allows you to play your favorite instrument while rapidly turning the speed knob to adjust the beat speed. -This metronome is lighter than a regular metronome and can be powered by USB or batteries, making it ideal for any musician to carry around and practice on any occasion. -Suitable for classical, , electric guitar, bass, violin, ukulele, piano, drum set, woodwind and other instruments. -Adjust the volume control for louder or smaller , allows you to practice at night without disturbing others. Package list: 1 x metronome 1 x USB cable