Specifications: Item Weight: 11g / 0.39oz Package Weight: 12g / 0.42oz Item Size: 4.4 * 3.7 * 1cm / 1.73 * 1.46 * 0.39in L * W * H Package Size: 12 * 8 * 1cm / 4.72 * 3.15 * 0.39in L * W * H) With this adapter, it is quite convenient for you to connect USB 3.0 cable with front USB 3.0 panel. Features: You are allowed to use it to convert USB 3.0 type-A female port into USB3.0 (20pin Header). And connects directly to mainboard. Features dual USB 3.0 ports and one 20Pin port Adopting environmentally friendly material features good electrical coductivity performance, strong anti disturbance, which ensures the stability of high speed data transmission.