[Work Speed]The adjustable fan controller set can operate 1 or 2 fans. The second fan (if applicable) after 10 seconds of fan 1 work. It operates in a hot manner, and also when the air conditioning is running. Circuit type: Pre-programmed Micro-controller. [Temperature Range]The electric fan controller kit adjustable temperature range is 104°F to 230°F (40°C to 110°C), and can display Celsius or Fahrenheit degrees. The temperature is set by pressing the set button. (LED digital temp display, actual temp + set temp.) [Digital Thermal Fan Switch for 0444]Fan switch kit can be used in 12 or 24 volt applications (if you intend to operate 24v fans you need to purchase standard 24v relays.) [Stable Performance]Digital radiator fan switch kit is made of standard material, wear and . Professional manufacturing, high qualit, and long service life. for single and dual fan applications., Weight: 0.86531437835 Pounds, Manufacturer: NONDK