The Zoom MRT-3B MRT3B Micro RhythmTrak Drum Machine is a compact and lightweight drum machine perfect for musicians on the go. With 7 pads for creating beats and a MIDI input for connecting to other instruments or software, this digital drum machine is powered by batteries for convenient portability. Made from durable plastic, the Zoom MRT-3B is an affordable and reliable option for drummers looking to add some rhythm to their music.