In order to control your hoists, an external controller is necessary. This controller can control each hoist separately or all 4 hoists simultaneously by putting the switch into the desired position. The controller has a safe emergency button with key lock in order to prevent unauthorized use of the controller and the hoists. The controller has 4 CEE 4-pole 16A connectors for the 110V control connections. The advantage of 110V control is that you can safe time on the complete cablework for your construction. As an additional feature this controller is equipped with an extra fase detector.