Features: 100% brand new and high quality Using multilayer circuit board to connect. USB3.0 high speed signal lossless transmission. Solve the problem that 19p cable directly inserted in the motherboard is not small enough to break the motherboard pin. The notch of the motherboard 19P interface faces the inside of the motherboard, choose A. The notch of the 19P interface of the motherboard faces the outside of the motherboard, choose B model. Package Includes: 1x Adapter Specifications: Type: Desktop Computer Motherboard Usb3.0 19p 20p Adapter Interface: Usb3.0 Color : Black Type A; The notch of the motherboard 19P interface faces the inside of the motherboard Type B; The notch of the 19P interface of the motherboard faces the outside of the motherboard note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.