1. Support PCIe 5.0X4 compatible with Gen3, Gen4, and Gen5. 2. Exclusive design of support base plate, R27C is applicable to E1.S hard disks and E3.S hard disks. 3. Gold finger gold-plated process, gold thickness to 10U. 4. High frequency low resistance high temperature anti oxygen PCB board, no deformation color topaz semi-transparent no white no black. 5. R27C under normal circumstances D1 lamp and D2 lamp are always on, D1 lamp will be on as long as the device is in the power state, if you need to extinguish the lamp, please turn off the power. Product Model: R27C Product Name: PCIe 5.0 x4 to E1.S/E3.S (SFF-TA-1002) Adapter Card Speed Bandwidth: PCIe 5.0 x4 Colour:black Material:PCB Please note: ssd or heatsink not included. Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 1 * PCIe 5.0 x4 to E1.S/E3.S (SFF-TA-1002) Adapter Card Only the above package content, other products are not included. Note: Light reflection 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.