This smart detector can not only detect smoke but also carbon monoxide for you, you can connect to Tuya app to receive the alarms, which is smart and saves you time. Try it, it won't disappoint you. Features: Carbon monoxide sensors and photoelectric infrared sensors are processed by microcomputer control technology, which has good stability, low power consumption and high sensitivity. Applications Wide: Suitable for gas water heater, bedroom, living room, parking lot, school, library, factory, hotel, etc. nearby. With sound and LED light, two alarm functions, which can respond quickly. When the detector triggers an alarm, it will emit an alarm sound of >. 85dB, which gives you a better using experience. Tuya APP Remote Check: After connecting with Tuya APP, you can check and receive alarms through the application itself when you are far away from home. Easy installation with the mounting bracket and screw kit, also made of high quality material, you don't need to change it often.