USB3.0 (that is, USB3.1 Gen1) and USB3.1 (that is, USB3.1 Gen2) have the same pins, and USB3.0 is backward compatible, and the part of USB2.0 is completely reserved. In addition, 5 wires are added to carry out full-duplex high-speed transmission. Although the cost is relatively high, it avoids the influence of wire quality problems to a certain extent. That is, the backward compatible part of USB2.0. Small size, easy to use. Made of high quality material, it is durable. Type: adapter board Rated current: 1.8A (1~4 pins) 0.25A (other pins) Withstanding : AC 100V () Working temperature: -55 degrees to 85 degrees Colour:green Material:PCB Size:25 x 20MM Package Contents: 1 x Adapter Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.