9V Battery Operated Photoelectric Smoke Alarm LED Light Flashing & Sound Warning Smoke Alert Detector for Home School Hotel

Klozey.com: 9V Battery Operated Photoelectric Smoke Alarm LED Light Flashing & Sound Warning Smoke Alert Detector for Home School Hotel This 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 the more and more light, 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 detect the smoke in house, shop, hotel, restaurant, office building, school, bank, library, computer house and storehouse, etc.   Features: Built-in high accurate infrared photoelectric sensor to detect smoke or combustion particles in air, rather than sense heat, flame or gas. If it detects smoke and the smoke attains the certain density, it will make a sound over 85dB and the red LED light will be flashing. Suitable for all the places, such as office, hotel, kitchen, bedroom, bathroom, garage, bank, library, computer house, storehouse, etc. When the voltage of battery is low or the chamber is dirty, it will beep once per 40s to remind you. With test function and auto reset function. High Stability, it has the dustproof, mothproof and anti outside light interference feature. Powered by a 9V battery (not included), comes with 2 screws and 2 plastic inserts, easy to install.   Specifications: Material: ABS Power Supply: 9V 6F22 battery(not included) ESD Current: ≤10uA Alarm Current: ≤20mA Alarm Loudness: ≥85dB/m Working Temperature: -10°C~50°C Working Humidity: ≤95%RH Detection Area: 20 square meters Alarm Indication: red light & sound prompt Item Size: 10.5 * 10.5 * 3.5cm / 4.1 * 4.1 * 1.4in Item Weight: 102g / 3.6oz Package Size: 10.5 * 10.5 * 3.5cm / 4.1 * 4.1 * 1.4in Package Weight: 105g / 3.7oz   Package List: 1 * Smoke Detector 2 * Screw 2 * Plastic Insert 1 * User Manual(English) 1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW. 2) Payment must be made within 3 days of order. 3) If you can't checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days.    1. WORLDWIDE SHIPPING. (Except some countries and APO/FPO) 2. Orders processed timely after the payment verification. 3. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. 4. The images shown are not the actual item and are for your reference only. 5. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season. 6. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction! 7. Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery. 1. You have 7 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS! 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