Operating Conditions: The fan activates at 180 degrees and shuts off at 165 degrees. Temperature Sensor Design: This electric cooling fan temperature sensor switch measures the temperature of any liquid, including water, oil, and coolant. Universal Fit: Suitable for most engine blocks, radiators, manifolds, or water outlets. Sturdy Construction: Made from resilient metal, ensuring a long lifespan, ideal for applications with a 1/8inch NPT port. Compatibility: Operates at 5A and requires use with a 12V or 24V relay. Thread Size: 1/8inch NPT Thread Top to Tip Length: 3.18cm/1.25inch Fan On Temperature (Fahrenheit): 180F Fan Off Temperature (Fahrenheit): 165F Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: Metal Package Contents: 1 x Cooling Fan Thermostat Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.