Akai Professional XR20 | Beat Production Station Drum Machine with 12 Trigger Pads, Note Repeat, and 700 Sounds Over 700 sounds produced by Chronic Music 99 Preset patterns and 99 User patterns Backlit LCD Bright, glowing, backlit pads that follow the beat Microphone input and Headphone output Battery Power capability and AC Adapter (included) Drum Roll / Note Repeat feature for realism and expression