Lamptron CM430 PWM Fan Controller with Black Housing & Red Lights CM430 Touch-based (Red LED) Intelligent Fan Controller with PWM Fan Control capability on first channel, and the remaining three channels control fan speed through voltage (voltage control ranges from 0 to 12VDC) Cooling fan speed will self adjust based on the High/Low temperature perimeters you enter 4 channels fan control for common +12VDC cooling fans each at a maximum of 30W output Alarm setting lets you set alarm based on temperature reading for each channel individually In Auto Mode the screen will automatically turn off after 3 minutes of idle time. In Manual Mode the screen will be on constantly