【Used】BOSS DB-90 Dr. Beat A metronome that can be used for a wide range of applications. Features a large, easy-to-see display with a backlight that simulates a pendulum. Includes a Rhythm Coach function to check for rhythm deviations. Equipped with a MIDI IN terminal for synchronization with external MIDI devices. ■ Electronic Metronome, Dr. Beat ■ Metronome ■ Auto Power Off = 60 minutes after the last button operation ■ Display: Custom LCD display 2 ■ Connectors: TRIG IN, START/STOP, MEMORY UP/DOWN, MIDI IN, PHONES x 2 (stereo standard, stereo mini type), INPUT, AC adapter ■ Speaker: 50mm x 1 ■ Power Supply: DC9V = Dry cell 006P/9V (6F22 manganese/6LR61 alkaline), AC adapter (PSA-100) ■ This metronome is effective for practical rhythm training at home and for use on live stages. Operation has been confirmed only with the genuine AC adapter (PSA-100S). Operation with DC9V dry cell batteries has not been confirmed. The protective film from the time of purchase is still attached to the LCD display. Used only in a non-smoking environment. Used only indoors at home, so there is almost no dirt. We are very sorry, but please refrain from price negotiations. Please consider purchasing at the listed price. Thank you very much.