1、Type C Interface: When you connect a device with a common type c interface, the JMS583 works, and the port speed is 10Gbps at this time, which can achieve a sequential read speed close to 1000MS. 2、For Thunderbolt4 USB0 Interface: When you connect a computer with for Thunderbolt4 USB0 interface, JHL7400 works, and the terminal speed is 40Gbps, which can achieve a sequential reading speed of nearly 3000M/s. 3、Actual Value: The actual value is also related to the speed, file format, driver firmware version and computer operating system of your SSD. 4、Applicable SSD: Only suitable for 2280 size M.2 M Key SSD solid state drive, with excellent performance. 5、Dual Master Control: The hard disk adapter card adopts JHL7440 MS583 A3 dual master control, long service life. 1 x USB4.0 Hard Disk Adapter Card Item Type: USB 4.0 Hard Disk Adapter CardMaterial: PCBProduct Model: PH8861Interface: for Thunderbolt4 40G USB 4.0Applicable SSD: NVMe M.2 2280System: for Windows, for OS X