. The Xantech 291-KIT is a prepackaged infrared repeater system, including a 291-00 IR Receiver, a 789-44 Connecting Block, a 781C-00 Power Supply and four 283M Blink-IR Mouse Emitters. These parts are all that are necessary to control up to four components. The 291-KIT is intended for use in IR control systems where the 789-44 Connecting Block is within reach of the 7-foot cable of the 291-00 ... as when installing the 291-KIT in a cabinet where the controlled components are behind closed doors. Price is $55 including shipping ($130 List) .