Transferspeed:PCIe 4.0, gen4, 64G/bps (Max.);PCIe 3.0, gen3, 32G/bps Wire length: 5 ~ 100 cm, the length can be customized Only supports one gap M-key NVMe SSD, Don't support two gaps BM-key SATA SSD. Application: for PCIe x16 Nvidia/AMD Graphics cards to M.2(ultra SSD, M-key) NVMe slot extension Operating Temp: -20 ~ 80 ETA5-8 working days after receiving your order.