Flame retardant and plug-resistant: The port have high hardness, wear resistance and plug-resistance Clear pin: The number of pin circuit board is clear, and connection port is large, which brings convenience for wiring Copper terminal: Adopt copper terminal, which have strong and better stable transmission Application: Compatible for all 50-pin devices Copper needle: Selected from copper, long service life, double-layer process for port, internal and external repair, and longer durability