features fan speed knobs for controlling 4 individual channels. With a large LCD display, it shows the fan speed and temperature. With alarm function, it is convenient to monitor the fan in normal operation in order to avoid the damage to the equipment. Take control of your fans with this 4 channel fan controller. Features: Control 4 Fans Simultaneously 4 channels stepless fan speed control, specially designed for PC enthusiasts. Better Monitor Equip with 4 sets of temperature probe, test detection range 0-99 degrees. Reduce Noise Reduce noise and maintain proper heat levels to keep all the parts of your computer running with high performance. LCD Display Large LCD screen shows the actual speed of each group of fan and the temperature. Alarm Function When the temperature is over 70℃， it will send an alert to promptly adjust the fan speed; When the fans stop or in exception condition, it will check the working status of the fan.