Fangrui Product Details Fangrui Product Details Using 4-layer Circuit Board: It Has Very Strong Anti-interference Ability, Effectively Ensuring The Stability Of Pci-e High-speed Signal Transmission, Data Integrity, Impedance Matching. Pcie Interface Expansion Effectively Solves The Problem Of Insufficient Pci-e Interface. This Product Can Expand 4 Pci-e. Fast Startup, High-speed Loading And File Transfer. Low Power Consumption, Quiet, Reliable And . High Gold Plating: Strong Oxidation Resistance, Good Conductivity And Wear Resistance. Product Interface: M.2 Key Pcie Number Of Interfaces: Pci-ex1 Interface * 4 System: Os / / Linux Colour: Black Material: Pcb Size: 22x80mm Package Contents: 1 * Pci-e Expansion Card 1 * Screwdriver 1 * Screw Only The Above Package Content, Other Products Are Not Included. Note: Light And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.