this is 9V battery smoke alarm use for home

9V Photo Electric Smoke Alarm

detect smoke will alarm before fire

Photo Electric Smoke Alarm

Specifications:
.Power source: DC9V, AC110V/AC220V, DC9V/AC110V/AC220V
Static current: <10uA
Alarm current: <10mA;
Alarm sound: >85dB (3M)
Ambient temperature: -10~40°C
Ambient humidity: ≤95% (40±2°C)
Low battery Alarm: 6V±0.5V

OEM are welcome