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. 1 x Dual Power Automatic Transfer Switch4 x Foot Mats1 x Manual Handle Item Type: Dual Power Automatic Transfer SwitchMaterial: Flame Retardant PC, SilverProduct Code: NRated Short Circuit Connection Capacity: 17KARated Short Circuit Current: 10kARated Frequency: 50HZGrade: PC GradeUsage Category: AC-33BSize: Approx. 228 x 184 x 105mm / 9 x 7.2 x 4.1in