Yamaha DD-55 digital percussion machine. Dusty but still works. Built-in speakers; Sony headphones included (some deterioration of material around the edges but still comfortable where they touch the ears). Features various sampled drum sounds, metronome function, record/loop, MIDI I/O ports, 7 hand pads and 2 foot pedals. Plug it in or run it on (a bunch of) batteries.
Owner’s manual: https://usa.yamaha.com/files/download/other_assets/2/319472/dd55.pdf
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Drum machine (Watertown near Belmont)
This offer has been gifted to someone and is no longer available.