1、Working Principle: When there is an abnormality in the normal power supply, the backup power supply immediately works to achieve the effect of continuous power supply, ensuring the continuity, reliability, and safety of power supply. 2、Auto and Manual Mode: This changeover switch supports automatic and manual operation, millisecond switching without power outage, with compact structure, reliable transmission, widely used in scenes where continuous power outages are not allowed. 3、Durable Materials: The shell of the power transfer switch is made of flame retardant PC material, has good insulation, high temperature resistance, aging resistance, and silver contacts can greatly improve conductivity and service life. 4、Screw Installation: This dual power automatic transfer switch has a simple structure and is installed with 4 screws, which is stable and reliable. It is widely used in household, commercial, or industrial applications. 5、Applicable Scenarios: This changeover switch is suitable for 50/60Hz emergency power supply system and is used in various places where continuous power outages are not allowed, such as factories, shopping malls, seedling farms, etc. Item Type: Dual Power Automatic Transfer Switch Material: Flame Retardant PC, Silver Product Code: N Rated Short Circuit Connection Capacity: 17KA Rated Short Circuit Current: 10kA Rated Frequency: 50HZ Grade: PC Grade Usage Category: AC-33B Size: Approx. 228 x 184 x 105mm / 9 x 7.2 x 4.1in 1 x Dual Power Automatic Transfer Switch 4 x Foot Mats 1 x Manual Handle