Automatically calls up to 5 programmed phone numbers when temperature drops below 42 degrees F. Keypad base unit plugs into phone line and electrical outlet, and the internal temperature sensor continually monitors your home while you're away. Will dial up to 5 numbers anywhere in North America when problem occurs. Quick plug-in installation, LCD display for easy programming, built-in 110dB alarm, battery backup for power failure. Battery included.
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