This tough polycarbonate cover with heater helps to protect a wide range of control panels and other equipment from vandalism, accidental damage or tampering in extreme environments. These covers can protect fire and security control panels and exterior fire system annunciators. Fast and easy installation, for indoor or outdoor applications. Designed to maintain temperature above freezing, the multi-voltage heater has three thermostats, and the radiant heat plate prevents LCD from becoming sluggish or freezing.