Specification:Item: Expansion CardInterface: PCI-E x 1 (compatible for x4, x8, x16)Expansion Port: Four USB 3.0 portsWorking Temperature: 0-70Transmission rate: 5GbpsSupporting Systems: for XP, WIN7, WIN8, WIN8.1, WIN10, etcItem Size: 12 * 5.8cm / 4.7 * 2.3inchItem weight: 46g / 1.6ozPackage Size: 15 * 12.5 * 2.5cm / 5.9 * 4.9 * 1inchPackage weight: 113g / 4oz Features:USB 3.0 PortFour standard USB 3.0 ports, with 9 contact points in total, ensure fast transfer rate.High quality main control chipDelivers low heat, fast speed and stable operation, to eliminate interference to the greatest extent.All-Solid Capacitor Each interface is provided with independent capacitor, ensuring the stable power supply, and delivering better high temperature resistance.With power supply moduleProvides 2A power supply, no external power supply required.Stable PerformancePCB plate ensures high stability of electrical performance.