Sarru Automation model TH2 is a 7 speed electronic ceiling fan remote regulator which gives humming less operation. It has avery good smooth start feature, while turning on the fan the inbuilt software gradually increase the speed and avoid starting jerk specially turning on at higher speeds. It consist one controller and one remote unit. You need to install the controller at top of the fan and inside the fan canopy or plastic cap. The controller size is small L=5.0cm, W=4.0cm, H=2.5cm and easily to install. Keep the controller sensor just outside from the canopy and do the wiring as per manual instructions. Put the batteries in remote and control your fan with remote. With remote you can turn ON or OFF the fan as well as you can regulate the fan speed in 7 different steps. Since it is fitted at inside the fan canopy, so it can be used with any type of switch board.