The KORG 9V600MACPP is an optional power supply compatible with a wide array of KORG's 9-volt products, including the Volca Beats, Volca Keys, Volca Bass and KR Mini. 9V600MACAPP is a universal power supply (100-240V) with a decidedly inline or brick design, so it won't take up unnecessary space on your power strip; making it an ideal adapter in situations where multiple smaller products are used.