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Features:
1) Battery: DC 9V, AC 110V / 220V
2) Alarm sound: ≥85db (3m)
3) Static current: <8uA
4) Alarm current: 10mA
5) Low voltage alarm: 5.5 - 6.2V
6) Working temperature: -5 ~ +40°C
7) Working humidity: <93%RH
8) Low battery alert remain: 7 - 15 days
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