1. Key Card Insertion: When a guest enters the hotel room, they are usually required to insert their RFID key card into a slot or holder located near the room's entrance. This slot is often located near the light switches or other convenient locations.

2. Power Activation: Once the key card is inserted into the switch, it completes an electrical circuit, allowing power to flow to the room's electrical devices, such as lights, air conditioning, television, and electrical outlets.

3. Energy Conservation: The key card switch is designed to detect the presence or absence of the key card. When the guest removes the key card from the switch slot, the circuit is broken, cutting off the power supply to the room's electrical devices.

4. Power Restoration: If the guest returns to the room and reinserts the key card, the circuit is completed again, restoring power to the devices. This allows guests to have electricity and control over the room's amenities while they are present

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