SATA power switch management and controller system, hard disk mechanical control switch Control and switch the power of internal SATA HDD/SSD separately, connect up to 4x SATA HDD at the same time Independent control of 4-channel hard disk power supply, energy saving and environmental protection, extending hard disk life HDD working status LED indicators are included Can be used as SATA powered CD/DVD devices ,fan hubs, RGB devices power management too 4 Pieces 2 feet power cables include, long enough for almost all PC Case Supports ATX standard chassis PCIe x1 slot for mounting is requested (no electrical functions is needed) With full-profile PCI slot cover for PC case rear mounting