Welcome to our store 1. LED monitoring indicator light; the blue light is always on when the hard disk is inserted, and the blue light flashes when data is being read. 2. The chipset has enhanced heat dissipation, longterm hightemperature resistance, and more stable operation. 3. No driver is required, plug and play, and supports common Windows/Linux/OS X/NAS/Synology. 4. Supports SATA interface hard disk/optical drive/SSD solid state drive. 5. Small size, easy to carry and store, simple to use, and great performance. Product Type: Expansion Card Product Main Control: Suitable for ASMedia ASM1166 main control Product Interface: PCIE4X8X16X (recommended to use under PCIE3.0 for faster speed) Support System: Suitable for WIN8/WIN10/Synology/Ubuntu Packing List: 1 x Expansion Card 1 x Baffle Package weight: about 100 grams. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution