The product belongs to the Type A double-layer mother seat series. There are two interfaces, the shape of which is an A-shaped interface, with a tongue plate installed in the center of the interior, a baffle welded on one side of the metal shell, and an insulation layer sleeved on the surface. There are four small bent legs at the bottom that are welded to the PCB board insert board, and there are 8 pin pins that are welded to the PCB board insert board. Fully covered with black glue. The difference between USB 2.0 and USB 3.0: USB 3.0 has a transmission rate of 5Gbps, while USB 2.0 has a speed of 480Mbps. The USB 3.0 interface is blue, and the color of USB 2.0 is white or black. The USB 3.0 interface is marked with a "SS" style, while USB 2.0 only marks ordinary USB universal identifiers. The pins of USB 3.0 are 9 pins and USB 2.0 are 4 pins. Product Material: The outer shell is a hardware iron shell, the plastic body is environmentally friendly and high-temperature resistant LCP plastic, and the pin is phosphorous copper.