Sunshine-tipway&reg; 5.25 Inch 4 Channel Touch Screen Fan Speed Controller Panel[3 Years Warranty] The fan controller is touch screen CNC milled front panel with touch screen,voltage adjusted:512V. Automatic and manual modes of control ,display temperature in both F and C Widescreen touch display fan speed governor, the liquid crystal display of protecting our eyes Temperaturealarm system, fan stuck prevention system Four groups of temperature measuring temperature: the temperature range of 0 C ~ 99 C. High precision temperature probe Accuracy: + / - 1 C