Works great. No cables or instruction. Missing one knob on the front. Works with 9V battery(NOT INCLUDED)

This Boss DB-90 Dr. Beat Metronome is a must-have for any musician looking for a reliable time-keeping device. With its compact and lightweight design, it can easily be taken on the go without adding unnecessary weight to your musical equipment.

Featuring a digital LCD display, memory function, jack input, volume control, bag/case, headphone jack, auto power-off function, and wearable design, this metronome is perfect for pianists, cellists, violinists, ukulele players, banjo players, and viola players alike. The black plastic material gives it a sleek and professional look, while the 1.5 inch height and 5.700 inch width make it easy to transport. Suitable for use with a variety of instruments, this metronome is a true must-have for any musician.