This BOSS DB-30 Dr. Beat Pocket-Size Metronome is a reliable and efficient tool for musicians who want to keep a steady tempo. It features various features, such as a tap tempo function, multiple rhythms, and a large display. The black color and compact design make it easy to carry around. The open box item has been tested and is in perfect working condition. The tuner/metronome is suitable for stringed instruments and belongs in the Musical Instruments & Gear, General Accessories, and Metronomes categories. The brand is BOSS, and the model is BOSS DB-30.