Features: This is a kind of fine quality surge protecting device, fire proof and corrosion-resistant. Plug-in design, support hot-line operation, simple and easy to use. Working status indicating window, green means normal and red means failure, which can effectively react the working status in time. Surge protect, prevents home electric network receive excessive impact while lightening. Detachable 35mm Din rail installation design, the base is reusable, help reduce the maintenance cost. Insulation connecting terminal, more reliable and more safety. Quickly react speed with strong bearing capacity. There are 3 types for you to choose, you can choose 2P, 3P, 4P according to your demands.