Features HIGH MATERIALS : Adopt copper accessory for better conductivity performance. FEATURE : Flame retardant shell, fire proof, safe to use. EASY TO INSTALL : Removable assembly, easy to plug and unplug. EASY TO OPERATE : DIN rail installation, simple operation. SUITABLE FOR : Protect electric system and on-loading electrical apparatus from thunder and instantaneous over-voltage. Specification: Condition: 100% Brand New Item Type: Protector Material: Plastic Rated voltage: 220V Model: 4P 40kA Uc: ~ 420V Application: Mounting electrical equipment to protect electrical systems and lightning and transient overvoltages Number of poles: 4 UP: UP<2.0KV Package list: 1 * House Surge Protector Note: This product only applies to DC 420V 40KA Package List