- Product: Photoelectric Smoke Alarm
- Brand: Zeta
- Model: ZT-MS
- Main power source: AC 220 V ~ AC 240 V, 50 Hz
- Standby power source: DC 9 V battery
- Operating temperature: 0 °C ~ +45 °C
- Operating humidity: 10 % ~ 90 % RH, non-condensing
- Alarm sounder output: ≥ 85 dB @ 3 m
- Interconnection (max): 24 units, 250 m cabling
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