Xantech 286D Blink-IR Dual Designer Emitter Simply insert the mono mini plug of the 286D emitter into the "EMITTERS" or "OUT" jacks on any of the Xantech Connecting Blocks or Controllers. Indicates the presence of stray IR or RF interference by randomly blinking when no IR control signal is being sent. Reposition the IR receiver of the interfering source to eliminate or reduce the random blinking. Length of wire: 7 feet to junction, 3 feet to each emitter