AL-CH4H Remote Control System 4 channel wireless control device mono/bistabe with dynamic code and operating range up to 100 meters. The 4 channel radio controller consists of receiver and hand transmitter with 12 V battery in form of key pendant with four different colour pushbuttons. Each pushbutton controls one channel, which can operate in monostable mode with settable relay ON time or in bistable mode. Coded control signal is sent from the transmitter to the receiver, in which is detected, decoded and controls the output relay. The output relays can operate as NC or NO depending on settings made on receiver PCB. The device uses the most sophisticated dynamic coding system developed by Keeloq Microchip Technology Inc., USA Each emitted code differs from previously sent one, and each transmitter has programmed different cod and code changing algorithm. The receiver must learn and memorise individually the cod of each transmitter. The system ensures the highest security level for each system user.