Videos: 
Product overview
How to wire heat cable to the single circuit thermostat controller w/GFEP!
When you want the controller inside and the thermostat outside!
 
This thermostatically controlled unit is designed to make your roof and gutter heat cable system safer, more efficient and more cost effective. Its adjustable thermostat allows for greater flexibility when mounting it outside, and the LED light(s) clearly indicates when the heat cable is, or is not, energized. A ground fault protection breaker (required by National Electric Code) is built in, ensuring safe system operation.