Specifications: This surge protector can protect electric system and on-loading electrical apparatus from thunder and instantaneous over-voltage. It is suitable for class C and D lightning protection, and is used to connect the equipotential chain during lightning strike. When lightning occurs, it responds quickly and unloads the voltage to protect the safety of household appliances and you. Made of flame retardant plastic, it is durable, wear-resistant and anti-rust. Built-in over-current, overheating and temperature control short circuit technology, it is safe and practical. Type: 4P Surge Protector Material: Flame Retardant Plastic Product Models: 1#: 20KA, 2#: 40KA, 3#: 65KA, 4#: 80KA Number of Poles: 4P Response Time: ≤25ns Rated Voltage: 420V 3C Rated Voltage Range: 220V-420V Installation Requirements: Use Standard 36mm Din-rail Installation, With Circuit Breaker Used in the Distribution Box Features: Easy to Install, Lightning Protection, Durable, White Size: 6.5cm x 7cm x 9cm/2.56" x 2.76" x 3.54" (Approx.) Notes: Due to the light and screen setting difference, the color of item may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 4P Surge Protector