1、SAFE PROTECTIVE COVER: This product has reasonable structure, small size, beautiful appearance, and has a protective cover, which makes the power supply safer and more reliable 2、ENSURE NORMAL LOAD: When the power supply fails (only test the normal A phase voltage and maintain the A phase voltage, only test the loss of voltage or phase loss), will automatically connect one or more load circuits from the power supply to another power supply to ensure normal power supply load. The power supply of the circuit ensures a good protection function 3、NOISELESS AND ENERGY SAVING: EPS fire fighting power interface, DC12~24V reliable, long distance double point, bring noiseless operation, energy saving, easy installation, simple operation, reliable and stable performance 4、COMPLETE PROTECTION FUNCTIONS: Come with short circuit protection, overload protection, under voltage protection, as well as fire protection, dual output and shutdown signal functions 5、WIDE APPLICATION: Widely used in the installation and use of lighting circuits in office buildings, shopping malls, banks, stations, hospitals and high rise buildings with fire protection requirements 1 x Dual Power Automatic Transfer Switch1 x User Manual Item Type: Dual Power Automatic Transfer Switch Model: NLQ4-125-4PRated Voltage: 400VRated Current: 125ARated Frequency: 50Hz/60HzRated Short Circuit Current: 3kAMechanical Life: Automatic: 3000 Times; Manual: 1500 TimesRated Insulation Voltage: 500V