Both versions can be combined with overload protection switches for undervoltage and overload protection The switch has the following functions, derived from power outage and undervoltage protection. Bipolar cut-off, unipolar cut-off function Widely used in machine tools, power tools, garden machinery and This is a switch. After the device is accidentally powered off, it not turn on. You need to the green button to turn it on., Manufacturer: Hundnsney