Add remote-control functionality to your LEGO models! Build this Power Functions IR receiver into your LEGO models and add amazing movement and functionality with a click of the remote control (available separately, see item #8885)! IR Reciver has 2 outputs that connect up to 2 different Power Functions. The Power Functions IR RC system operates on 4 different channels enabling you to control 4 different models at the same time. The reaching distance of the infra-red RC system is at least 30′ (10m). Requires battery box (Item #8881), not included.