Features Fast Switching: The backup power immediately takes over during power abnormalities, ensuring continuous power supply with millisecond level switching for reliability and safety. Dual Power Conversion Switch: Featuring a PC grade infrequent switching design, with dual workstation setup offering A as primary power and B as backup power. Versatile Application: Automatically switches to backup power during outages and back to main power upon restoration, ideal for emergency power systems in 50 or 60Hz AC circuits, widely used in scenarios that cannot afford continuous power interruptions. PC Material: Crafted from premium flame retardant PC plastic material, excellent insulation, high temperature resistances, anti aging properties, safety assurance, and silver contacts greatly enhance conductivity and lifespan. Easy Installation: A compact household power switch for detecting the status of main or backup power, compact size, lightweight, simplifying installation process significantly. Spec: Item Type: Dual Power Automatic Transfer Switch Material: PC Rated Insulation Voltage (Ui): 690V Rated Current: 63A Frequency: 50, 60Hz Package List: 1 x Dual Power Automatic Transfer Switch 1 x Instruction Manual Package List 1 x Dual Power Automatic Transfer Switch 1 x Instruction Manual