The Donner Circle Looper offers 100 drum grooves, 10 metronome styles, and unlimited overdubs. Each track allows up to 4 minutes of recording, with 40 presets and 160 minutes total capacity. Features include dual mono inputs, BPM display with tap tempo, volume control, and a clear time display for Rec/Overdub/Play modes. Editor software for control via USB can be downloaded from Donner website. 9V adapter and USB cable not included.