* CPU PIC12F629 at 4MHz crystal for Tx/Rx
* 3 channel output relay
* The Tx use sleep mode for saving battery power
* Use Phillips RC5 protocal
* distance more than 7 m.
* Easy circuit to build and assembly
On both the sides (Tx and Rx), it uses PIC12F629 microchips. For firmware and receiver part, visit here.