The Flex-A-Lite Compact Adjustable Electric Fan Controller and Relay Kit makes it easy to wire and control an electric fan. This controller and electric fan relay kit eliminates the need for external relays and includes everything needed for typical installations, including potted electronics for water resistance and protection from vibration. It provides adjustable fan activation from approximately 160 to 220 degrees Fahrenheit, and activates the electric fan whenever the A/C is on for optimum A/C performance and engine cooling. The controller comes with a thread-in temperature sensor, a 30-amp relay and inline fuse, provisions for an optional manual override switch, wiring and electrical terminals for most common applications using an electric radiator fan or engine cooling fan. It also includes two temperature probe adapter bushings to fit 1/4-, 3/8- and 1/2-inch NPT threaded ports. Compatible for use with 12-volt/20-amp cooling fans, this controller is one of the most versatile car parts available to control single and dual electric fan systems. The auto parts fan controller comes with a one-year manufacturer warranty, providing peace of mind for car enthusiasts who demand quality and reliability.