Jm575 master controller adopts the latest jmb575 chip solution, with high-speed mission and stable performance, and is committed to meeting the needs of users for massive data space Aluminum alloy heat sink is more durable. In order to enhance the stability of operation, aluminum alloy heat sink is added Smart indicator each SATA port corresponds to a two-color LED indicator green: the device is connected normally Red: the read-write data flashes Computers that support SATA PM function can't drive. Computers that don't support PM function can't use it More widely used, ph58 can be combined with 2 ph57 to become PC I-E to 10 port SATA expansion card Support hard disk: HDD SSD supporting SATA protocol Support: 5 SATA devices System: for Mac os /windows/ linux Speed: SATA 3 (6G) size:80x22mm Material:Aluminum alloy colour:black Package Contents: 1 * Expansion 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.