Roland MC-101 GrooveboxLightweight and runs on four AA batteries, making it easy to create music anywhere. Features a four track sequencer optimized for electronic and dance music production. Shares the same high quality sounds, sequencing, and effects as the larger MC 707. Utilizes Rolands advanced ZEN Core synth engine, offering a wide range of legendary sounds. Comes with a collection of ready to use sounds and patterns, perfect for quick music creation. Allows you to