PS: Every room has a master switch. If the electrical noise is too loud, you can turn off the main switch, but this will not affect the power supply of the UPS socket.
PS: My friend received a complaint from an African friend in the guest room at the front desk, saying that the air conditioner in the room was too noisy. My friend said it would be quiet to turn off the air conditioner. My African friend said it was too hot to turn off the air conditioner. My friend said, "Are you afraid of the heat from Africa?"