1) with A Type / B Type / Mini Type and other types of interface design. A Type / B Type / Mini Type ect.kinds of connector design. 2) terminal contact portion with flexible design to ensure good contact and extend the life of the swap. Flexibility design for terminal interface to ensure nice contact and prolong the operating force. 3) terminal contact area gold plated, increase data transfer speed. The place that the terminal contacting is gold-plated, it is to fast the data transmiting speed.l 4) Termination Solder, tin-plated to ensure good wetting of the welding firm. The place that terminal soldering is stannum-plated, it is to make the soldering better.