Feature:1. The blue light is normally on when the hard disk is inserted, and the blue light flashes when reading data. Monitor the working status of the hard disk at any time.2. The chip enhances heat dissipation, longlasting high temperature resistance and more stable operation.3. This product does not need to be driven, plug and play, very convenient.4. Product interface is PCIE4X8X16X, support for WIN8/WIN10/Synology/Ubuntu system.5. Made of highquality materials, strong and durable, has a long service life.Specification:Item Type: Expansion CardProduct Master: For ASMedia ASM1166 masterProduct Color: PCB blackProduct Interface: PCIE4X8X16X (recommended for use under PCIE3.0, faster)Support System: For WIN8/WIN10/Synology/Ubuntu.Package List:1 x Expansion Card1 x Bezel