Features: brand new and high quality Using multilayer circuit board to connect. USB3.0 high speed signal lossless transmission. Solve the problem that the 19p cable directly inserted into the motherboard is not small enough to break the motherboard pin. The notch for the motherboard 19P interface is located on the inside of the motherboard, please choose A . The notch on the motherboard 19P interface is facing the outside of the motherboard, choose model B. Specifications: Type: desktop computer motherboard USB3.0 19p 20p adapter Interface: USB3.0 Color: black Model : A/B(optional) Size: approx. 7x5x0.5cm/2.76x1.97x0.2in Package Includes: 1PC x adapter note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from actual item.