The stainless steel shell (SUS304) is made by the three injection molding process (the third mock examination), which is matched with the brass terminal (C2680) and the LCP rubber core (Japan Baoli E471i) to achieve high strength and high temperature resistance. The SMT design of the four pin plug-in board on the board is adapted to the compact PCB, with an overall length of 7.35mm. The 16PIN configuration supports USB2.0 data transmission (480Mbps), DisplayPort Alt mode (version 1.2) and 5V/5A high current power supply, and meets diversified requirements through the third mock examination protocol switching. The diameter of the positioning column is 1.0mm (tolerance ± 0.1mm) to enhance mechanical stability, suitable for industrial control, medical equipment, consumer electronics and other scenarios. It has passed RoHS/REACH certification and UL 94 V-0 flame retardant testing.