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Description: This product named photoelectric detector detects the smoke by a couple of infrared diodes. The principle of detecting is granule in the smoke can reflect infrared light. Infrared diodes are placed in the special chamber. The chamber can shield external light, but don’t affect the smoke into it. While have no smoke, the diode can receive very weak infrared light. When the smoke entering the chamber, diode can receive more and more lights, when the smoke attains the certain density, the detector can give out alarm signal. In order to reduce the interference and lower power consumption, the emitting circuit adopts the pulse signal. The detector adopts the special structure design and ASIC, has the dustproof, mothproof and anti outside light interference feature etc. the detector is suitable for detecting the smoke in house, shop, hotel, restaurant, office building, school, bank, library, computer house and storehouse etc. Specifications: Independence type Smoke Alarm Operating Voltage: 9V battery 6F22(Not included) Static Current: ≤10uA Alarm Current: ≤20mA Alarm Indication: red LED flash Sound Level: ≥85dB/m Operating Temperature: -10℃~+50℃ Operating Humidity: ≤95%RH Alarm Output: sound and flash alarm Size :107mm dia. *35mm deep Sensor: Photoelectric sensor Package Included: 1 x Smoke Alarm 2 x screws 1 x manual Notes: 1, the product should be tested regularly. Press the test button to test whether the product is working properly and whether the buzzer will beep. 2. In order to ensure the sensitivity of the product, the surface of the detector should be cleaned with a soft brush every 6 months. The power must be disconnected before cleaning. 3. When the battery voltage is insufficient, the buzzer will emit a short “beep” every 40 seconds. To ensure the detection sensitivity of the detector, please replace the battery in time. 4. If the detector is not working properly or is damaged, please do not disassemble it yourself. 5, Photoelectric smoke detectors can reduce the occurrence of disasters, But it cannot be guaranteed to be foolproof. For your safety, please use this product correctly, at the same time, we should be vigilant in daily life and strengthen the awareness of safety and prevention.