... ,RoHS (4)more than 15 years experience 1 mainly used for fan speed control2 reheating furnace of tempering regulating and high-power bulb ... MFC-111-4KW MFC-111-5KW Mainly used for the speed regulation of the fan, temperature and voltage control of the furnace, and ... and use, with stable and anti-jamming function at work. FAN SPEED CONTROLLER,POWER REGULATOR