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Fireboy Smoke and Heat Detectors are hard wired for 12/24VDC Supply Voltage: 10-30 VDC (auto sensing). Quiescent Current: 12 milliamps (with backlight off). Voltage and EMI protected. Reverse polarity protected. Data retention 50 years without power.
The Photo Electric Smoke Detector is Model AP65-PESD-02-TB. The Heat Detector up to 170F is Model AP65-HD170-02-TB.