Extended PCI-E X4 interface for X1/X4 interface devices power supply for file transmission faster and more stable Expand the SATA power supply port With advanced heat dissipation solution, double-sided copper hole strip porous heat dissipation structure reduces high heat generated. Minipci-e to PCI-E X4 lossless switching High-speed transmission, stable and compatible Product name: MINIPCI-E to PCI-E X4 Number of interfaces: PCI-EX4 Applicable slot: MINI PCI-E Bus bandwidth: about 2Gb/s Working environment: 0Celsius-55Celsius, humidity 85 Storage temperature: -20Celsius-65Celsius, humidity 85 colour:Black Material:PCB+metal size:80 x 22MM Package Contents: 2 x Expansion Board 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.