Can't the hotel smoke? What is this?

The alarm will give an alarm when it detects smoke. You can smoke in the hotel as long as there is an ashtray in the room. If there is no ashtray, you can smoke less, but smoking is not allowed in the corridors and living rooms of some hotels.

Extended data:

Smoke detector is actually another name for smoke detector or smoke detector. Smoke detectors can prevent fire by monitoring the concentration of smoke. An ion smoke sensor is used inside. Ion smoke sensor is a kind of sensor with advanced technology and stable and reliable work. It is widely used in various fire alarm systems, and its performance is far superior to that of gas-sensitive resistance fire detectors.