Sewell BlastIR SW-29311 Infrared (IR) Remote Control Receiver Kit (Black) Forward infrared signals to operate electronic components behind closed doors IR Receiver has size of 2.25in (L) x 0.5in (W) x 0.5in (H); 9ft cable is attached for connection to IR Repeater Emitters have a dual emitter y-cable; overall length is 9 feet; final 3 feet may be separated. 38kHz & 56kHz transmit frequency. Simple to use; Controls 4 devices (expandable to a maximum of 12) Kit includes: IR Distribution Block; Mini IR Receiver; (4) Dual IR Emitters; AC/DC Adapter; 2 Mounting Screws