Energy saving switch ( it is also called power switch ) is specially designed for hotel guestroom with the purpose of energy saving. When guests enter a hotel guestroom and insert a keycard into the energy switch, the main power supply can be put through. The lighting system, TV set and sockets in the room will then be activated. And when the guest leaves the room, the power supply will be cut off automatically 5-10 seconds after the guests remove the keycard, that ensure the guests leave the room safely with sufficient lighting. It is normally installed on the wall of guestrooms for convenience.