Features:100% brand new and high qualityUsing 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 AdapterSpecifications:Type: Desktop Computer Motherboard Usb3.0 19p 20p AdapterInterface: Usb3.0Color : BlackType A; The notch of the motherboard 19P interface faces the inside of the motherboardType B; The notch of the 19P interface of the motherboard faces the outside of the motherboardnote: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.