This 12V 25A universal rotary three speed air conditioning fan switch has excellent performance and can provide stable power for your air conditioning system. It is equipped with an easy-to-use plastic "fan" knob, connected by a 1/4 "'D 'axis, allowing you to easily adjust the wind speed, with four gears: off/low/medium/high. The five plug terminals of the switch are designed reasonably, with "H", "M", and "L" controlling different wind speeds respectively. "B" is the power supply access terminal, and "C" can be connected to components such as clutches. The motor and switch are grounded internally and externally to ensure safety. Its size is a threaded shaft length of approximately 3/8 ", the main body is a 1" x 1 "square, and the threaded shaft diameter is 7/16", making installation easy. In addition, it has strong compatibility and can replace various models such as the Four Seasons 35702 and Honda 00091-31511, making it an ideal choice for air conditioning fan switches.