The switch is designed with power outage and undervoltage protection features. It includes bipolar and unipolar cut-off functions. Both versions are compatible with overload protection switches for enhanced undervoltage and overload safeguarding. It finds extensive application in machine tools, power tools, garden machinery, and similar equipment. This is a safety switch; if the device is unintentionally powered off, it will not turn on automatically. The green start button must be pressed to reactivate it. Type: AC220V KJD17 4 Pin Color: Black Material: Plastic Package Contents: 1 x electromagnetic push button switch Only the above package content is included; other products are not part of the sale. Note: Lighting and different displays may cause the item's color in the picture to slightly differ from the actual product. The allowed measurement error is +/- 1-3cm.