DESC: Kit includes: IR Distribution Block; Mini IR Receiver; (2) Dual IR Emitters; AC/DC Adapter Simple to use; Controls 4 devices (expandable to a maximum of 12) IR Receiver and IR Repeater have blinking Blue LED to confirm receipt of IR Signal IR Repeater designed for shelf or wall mount Careful consideration must be used when placing the IR Receiver near a Plasma Display. Plasma Displays emit IR frequencies during use and may cause interference.