Check the listing for details. Boss DB-90 - Dr. Beat Metronome. Color: see description, Condition: New. Listed at 220.78 USD. Practice in style with the flagship Dr. Beat Metronome Series. The new DB-90 offers tons of high-quality sounds and drum patterns to make your practice sessions more interesting and musical. There is a rhythm coach function with built-in microphone and input for V-drum pads, a reference tone function for tuning, an instrument input, a MIDI input for synchronization and many other useful tools for successful and fun practicing. - Practice with the Rhythm Coach by connecting an optional V-Pad - Practice pads and acoustic drums are recognized via the built-in microphone All of our items have a 30-day return policy without explanation. Notes, reading and software are excluded from the exchange. The General Terms and Conditions of Zoundhouse GmbH & Co. KG apply. If you intend to buy multi.