Feature: 1. Visual Window: Come with visual window, red and green lights indicate power on and off at a glance 2. Anti Crack Buckle: Anti crack buckle is designed to prevent buckle from cracking, bring easy and convenient wiring 3. PC Flame Retardant Material: The shell of the voltage arrester is made of PC flame retardant material, fire prevention, safer to use 4. Removable Components: Come with stable performance and easy installation. Detachable assembly, easy to plug and unplug 5. Excellent Performance: SPS surge protective devices come with stable structure, excellent performance and long service life Specification: Item Type: SPD Surge Protective Devices Product Material: PC Product Model: RMU1-C20 Nominal Discharge Current: 10kA; 20kA; 30kA Level: 2P Installation Method: Rail installation. Package List: 2 x SPD Surge Protective Devices Note: Used for maintenance and installation related to electricity. Make sure that the operator has the qualification for electrician work and take necessary protective measures such as power off and insulation.