Features: Five kind of plugs can be selected to meet the needs of different interfaces. Good technology double-layer process, resistance to insertion and extraction, strong oxidation resistance, strong interferences resistant. Environmental protections rubber cored good rubber cored flame retardant safe using ABS black rubber cores, environmental protections, flame retardant, wear-resistant. Full coppered good pin process using full coppered pin, strong contact, more stable signal transmission. Stable contact contact strong transmission more stable, strong, antioxidant contacts, pulling and inserting smooth and not loose.