[Comprehensive Protection]Built-in protections include short-circuit, overload, phase loss and under/over-voltage safeguards to maintain safe operation under abnormal grid conditions. [High-quality Materials]The housing is made of high-strength, flame-retardant PC material with excellent insulation, heat resistance and aging resistance. [Product Specifications]This dual power automatic transfer switch is rated 100A, 110V, 50/60Hz with 2-pole design and 690V insulation level. It supports automatic or manual modes and uses a standard 35mm DIN rail mounting structure, making installation compact, stable and convenient for both new projects and system upgrades. [Dual-mode Operation]Supports both automatic and manual operating modes to suit different scenarios. In automatic mode, the unit detects recovery of main power and switches back seamlessly, reducing downtime. In manual mode, you can flexibly select the preferred power source from the front panel. [Wide Application]Suitable for homes, RVs, small factories, laboratories, hospitals and other sites that require reliable backup power., Manufacturer: Littimoon