Wireless IR Extender System Kit WL-T1 allows you to control devices between 30 to 150 meters away through walls, doors, ceilings, floors, etc.  Note that different home build up and wireless equipments use at home may affect IR transmitting distance. Set Up : Wireless Receiver Block is to be placed in the same locations as the devices you are trying to control. When it gets the signal from the Transmitter Block, the IR emitter connected on the Receiver block will send the signals to respective devices inside the cabinet. Wireless Transmitter Block is at the location where remote control will be taking place. It is connected with an IR Receiver which receive signals from remote control. Upon receiving the signal from IR Receiver, the transmitter will send signal to Receiver Block at another location. Additional Wireless Transmitter block can be purchased if user want to remote control from more locations.