1、Device Working Mechanism: When the system has a surge overvoltage due to thunder or other reasons, the protector immediately opens quickly within nanoseconds and introduces the surge overvoltage to the earth to provide protection for electrical devices. 2、Insulated Terminal: This surge protection device is with plug in design, support hot line operation. Insulated terminals, reliable and safe, rapid response time, strong load bearing capacity. 3、Condition Indication Window: This surge protection device has a working status indication window, green indicates normal, red indicates fault. 4、Fireproof and Corrosion Proof: Our surge protection device is fireproof and corrosion resisting and stable, can effectively respond to the working status. 5、Made of PC Material: Our surge protection device is made of flame retardant PC material with exquisite craftsmanship, easy to use, very simple to install through the guide rails.