Humanized design: See it transparently, you can clearly see whether the wiring is in place, which is convenient for users to investigate. Flame retardant material: environmentally friendly flame retardant PA insulation material, long life, corrosion resistance, aging resistance, high temperature resistance. Security test hole: There is a test hole on the top of the product, which can be tested with an electric pen.. Copper bar: electrolytic copper, tin-plated surface can prevent copper oxide from oxidizing and maintain good electrical conductivity. High-quality materials: safer and more comfortable to use., Manufacturer: SOYWIM