Protect your home, cabin, computer room, nursery, or any other temperature sensitive area Automatically calls up to 3 phone numbers when the temperature gets out of range, the power goes out, or if the back-up battery needs replacing With a simple phone call you can check the current temperature, whether the power is on or off, or the voltage of the backup battery Continuously calls all 3 phone numbers and gives a voice warning of what the actual problem is Gain peace of mind knowing you'll get that call if something happens in your home, or call anytime to see that all is well