Combine this sleek receiver box with the 5394X forward-only kit to trim weight from your Revo for maximum track performance. The compact box features a tight-fitting, contamination-resistant cover, and an integrated on-off switch mount. The box can accommodate 4 AA cells, or a 5-cell rechargeable NiMH flat-pack. There's even a built-in personal transponder mount for extra convenience on race day.