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)
Standby current:<=10μA
Alarm current:<=15mA
Operating voltage: DC9V
Alarm indication: red LED flash & sound
Loudness:<=120dB
Operating temperature: -10 degrees centigrade to +50 degrees centigrade
Operating humidity:<=95%RH (40+/-2 degrees centigrade)
Detecting area: 60 sqm
Item size: 3.4 * 10.7cm/ 1.3 * 4.2in (diameter)
Item weight: 100g/ 3.5oz
Package size: 10.5 * 10.5 * 4cm/ 4.1 * 4.1 * 1.5in
Package weight: 133g/ 4.7oz