waterproof 1: Waterproof (IP67) and Waterproof (IP50) 2: The power input and power output with a different lock to avoid short circuit Quick and easy twist lock. 3:Material for the nylon fiber, fire rating V-0, corrosion resistance, good weather resistance and excellent electrical properties 4:High temperature environment still has good electrical insulation, 5:Socket terminals using imported beryllium copper, with high life expectancy and conductivity.