First Alert Battery-Operated Fire Smoke Alarm Detector(White)

1. Size: 107*35mm
2. The shell is made of ABS fire-proof material and its sensitivity meets UL217 standard.
3. Working Voltage: DC9V 1*6F22 Battery
4. Alarm mode: acousto-optic alarm
5. Suitable for indoor families, dance halls, warehouses, etc.

Test methods:
1. Button test method. Press the test button on the smoke sensor directly. After a few seconds, the alarm will be sent out directly.
2. Smoke test. Smoke is sprayed through the hole of the smoke sensor. Smoke should not be too thin. After a while, the light on the smoke sensor will start to flicker, and after a while, an alarm will be issued