Specification --- Maximum continuous operating voltage Uc: 500V DC; Rated input discharge current: 20kA (8/20s); Maximum discharge current Imax: 40kA (8/20s); Overvoltage protection level: 2.8kV; Number of poles: 2P; Protection level: IP20; Working temperature: -40~80, humidity: 90% (average at 25). Function --- The surge protector can protect the DC power system from lightning or surges. This surge protector can respond quickly when lightning strikes, discharge the voltage, and protect your home appliances and safety. Easy to use --- Very easy to connect to the circuit, and the simple wiring can be completed in a few minutes. Works great for protecting DC power system from lightning or surge. High Quality---The product shell is made of PC flame retardant material, which is safer to use. The product is made of precise electronic components, with longer service life and more stable performance.