Particularly suited to hotels and student accommodation. Switches heater off or reduces the temperature when room is unoccupied. When card is inserted, room temperature is boosted until removed. Able to switch two separate 20A circuits giving control of suitable heaters up to 3kW and power to any other device, (e.g lighting circuit). Neon pocket indicator gives an easily visible back-lit slot when located in dark areas. Card switch suitable for any credit card-sized entry card (including VINGCARD and CORKEY door entry systems).