The Sonnet Echo 20 Thunderbolt 4 SuperDock utilizes Thunderbolt 4 to provide multiple ports and expansion options to your compatible computer with a single cable. Gain access to a variety of connections, such as Thunderbolt 4, USB 3.2 Gen 2, 2.5 GbE RJ45 LAN, 3.5mm audio jacks, and more. The HDMI 2.1 port allows you to connect an 8K @ 60 Hz display directly to the dock without the need for an adapter. There are also storage expansion options, such as the M.2 NVMe SSD slot and a SD 4.0 card reader.