Elmes STM-2K controller is designed for remote control of two devices powered by 230VAC such as lamps, motors, etc. Miniature size of the controller allows its installation under a wall switch in electric installation boxes (wall plaster type – 60mm deep). Wall switch, if used for wired control, may be single (if only one channel will be used) or double (for two outputs to be used) button. The wall switch should be a monostable type (automatic off). The receiver includes the KEELOQ® code-hopping system of Microchip Technology Inc., USA for high-est level of security.