10pcs Fire Smoke Sensor Detector Alarm Tester Home Security System Cordless

Features: LED light flash indicator. Low battery indication. Independent installation on ceilings and walls, with mounting bracket, which is easy to install and do not need to debug. With specially designed cover, can protect it from dust. Built-in dedicated IC: with stable performance and high sensitivity. Can monitor air and detect smoke with optical principles. When it reaches the maximum amount that the chamber can bear, it will alert. With a test button: can take analog alarm tests of the smoke alarm. Can warn and alert people to stay far away from dangerous field when it detects smoke. Suitable for use in house, shop, school, office building, storage areas, etc. Specifications: Color: white Material: ABS Power supply: 9V battery (not included) Alarm current: ≤20mA Operating voltage: DC12V Alarm indication: red LED flash Loudness: ≤85dB/m Operating temperature: -10 ℃ to +50 ℃ Operating humidity: ≤95%RH (40±2 degrees centigrade) Detecting area: 20 sqm Single size: 3.5*10.7*10.7cm Suitable for: use in house, shop, school, office building, storage areas, etc. Packing Includes: 10pcs * Smoke alarm 1 * Bag of screws 1 * User manual

LED light flash indicator. Low battery indication. Independent installation on ceilings and walls, with mounting bracket, which is easy to install and do not need to debug. With specially designed cover, can protect it from dust.