Korg KR Mini Rhythm Machine with 60 Diverse Rhythm Patterns Bundle with Batteries, Headphones, and Austin Bazaar Polishing Cloth Easy and simple design; just select a rhythm pattern and press the play button Chain function lets you arrange your favorite rhythm patterns and fill-ins to create songs Optional foot switch lets you control fill in/start/stop hands-free Built-in speaker with 2W output helps you jam anywhere without the need for a monitor Two-way power; use the AC adaptor or batteries (AA alkaline batteries x 3)