Technical parameters:
1. Installation: Suck in the ceiling and independent installation
2. Alarm mode: Independent
3. Alarm Sonority: ??85db
4. Product size: ??102X36mm
5. Installation size: 64mm
6. Power supplied: DC 9V battery
7. Static Current: <10uA
8. Alarm Current: <12mA
9. Working temperature: -10 Degree Celsius ????+60 Degree Celsius
10. Working humidity: ??95%RH(40+-2 Degree Celsius )
11. Protection area: Below 6 m, the protection area is 60 square meters