The box is designed to be powered with 1 to 4 V-Lock batteries, which are widely used and easy to find. It is compatible with all the SWIT V-Lock batteries or 3rd party batteries. The auto-balanced circuit design helps power the box with 1 to 4 batteries, of different capacity. The maximum output is limited by the batteries output. You can select 4-pin XLR 11 to 16.8V, 15A (180W), or 3-pin XLR 22 to 33.6V, 15A (360W) output.