Features:

Ionization / Photoelectric Smoke Detector
Ceiling Mount, LED Indicator
Wired Network Output
Alarm Output: NC/NO
Power: DC12V
Current: Stand by: 3mA, Alarming: 30mA
Working Temp: -10℃ ~ +50℃
Working Humidity: ≤90% RH
Size: (φ×H): 112×41 (mm)
85 dB Buzzer Inside
Backup Battery Inside