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TUYA wireless photoelectric cigarette smoke detector, Wi-Fi  Features: Smart wireless smoke detector with a photoelectric sensor that detects cigarette smoke early from any direction. It triggers an optical and audible alarm and sends warning messages via the TUYA app over a Wi-Fi network. The smoke detector can be connected and configured directly via the Tuya Smart or Smart Life smart app. No additional control panels or devices are required; it can operate independently. You can use the test button to check that the device is working properly every week. Mute function: if the alarm is false, you can temporarily mute it.  Very convenient and easy to use! Lightweight and small, with low energy consumption. It is recommended to mount the detector on the ceiling in the middle of the room for more effective smoke detection, 30 cm away from light fixtures and >15 cm away from walls and corners.  The device can be used in schools, offices, dormitories, public spaces, and other rooms where it is important to ensure clean air and control of prohibited smoke.  Technical specifications: Sensor type: photoelectric. Voltage: 9V DC. Sensor sensitivity: 0.1-0.2dB/m. Audible alarm: >85dB@3m. Light alarm: red LED. Standby current: