The Compact Adjustable Electric Fan Controller and Relay Kit with Push-In Probe from Flex-A-Lite makes it easy to wire and control an electric fan. The built-in features of the Flex-A-Lite Compact Adjustable Electric Fan Controller and Relay Kit with Push-In Probe make this one of the most versatile fan controllers available. Adjustable fan activation from approximately 160 - 220° F. Includes 30-amp relay and inline fuse. Rated for use with fans up to 20-amp draw (continuous). Potted electronics for water resistance and protection from vibration. Activates the electric fan whenever the A/C is on for optimum A/C performance and engine cooling. Provision for an optional manual override switch.The push-in temperature sensor installed easily between radiator tubes and fins.