Features :

    1.    Independent installation on ceilings and walls, with mounting bracket, which is easy to install.
    2.    With specially designed cover, can protect it from dust.
    3.    Built-in dedicated IC: with stable performance and high sensitivity.
    4.    Can monitor air and detect smoke with optical principles. When it reaches the maximum amount that the chamber can bear,
           it will alert.
    5.    LED light flash indicator.
    6.    Low battery indication.
    7.    With a test button: can take analog alarm tests of the smoke alarm.
    8.    Can warn and alert people to stay far away from dangerous field when it detects smoke.
    9.    Suitable for use in house, shop, school, office building, storage areas, etc.

Specifications:

    1.      Color: white  
    2.      Material: ABS
    3.      Power supply: 9V battery [not included]
    4.      Standby current: ≤10μA
    5.      Alarm current: ≤15mA
    6.      Operating voltage: DC9V
    7.      Alarm indication: red LED flash & sound
    8.      Loudness: ≤120dB
    9.      Operating temperature: -10 degrees centigrade to +50 degrees centigrade
   10.     Operating humidity: ≤95%RH [40±2 degrees centigrade]
   11.     Detecting area: 60 sqm
   12.     Item size: 3.4 * 10.7cm/ 1.3 * 4.2in [diameter]
   13.     Item weight: 100g/ 3.5oz
   14.     Package size: 10.5 * 10.5 * 4cm/ 4.1 * 4.1 * 1.5in
   15.     Package weight: 133g/ 4.7oz