Universal four relay outputs receiver (U4HR)* and sets (U4HS & U4HSL)* are designed for use in alarm systems and remote control applications. The sets consist of U4H receiver and one four buttons hand held remote control transmitter. The devices use KEELOQ dynamic coding technology and the receiver operates with all Elmes made 434 MHz radio band transmitters and wireless detectors including specific RP501 transmitter made by Elmes Electronic.