An inexpensive way to control the operation of your Kasco De-icer by using air temperature.The C-10 uses an air temperature thermostat to turn the de-icer on when the temperature drops below a set point that you decide. One C-10 controls one 120V de-icer. The C-10 plugs into a standard 120V outlet and allows you to set an air temperature setting. When the air temperature drops below that setting, the C-10 will turn on the De-icer and off again when the temperature rises, saving money on costly electrical bills.Savings example: Using a Kasco 1/2hp, 2400D De-Icer and a C-10 Controller, you can avoid the hassle and expense of removing your dock and boat from the water for as little as $15 per month! Designed for use with Kasco 120V AC De-Icers.Important: The C-10 is designed to operate only one Kasco De-icer. Daily observation is required for all de-icing installations. Any electrical equipment should be plugged into a GFCI-protected outlet or circuit for safety, especially in water. It is never a good idea to be in the water with electrical equipment in operation or even plugged in. Also, make sure to test the GFCI breaker in the circuit once a month to ensure proper operation.Owner's Manual