Body only. Supported operating systems include macOS High Sierra and later, as well as Windows 10 64bit (1809 and later), but it will primarily be used with older Macs. It is bus-powered, and the network supports 10 Gigabit LAN, as well as 5 Gigabit / 2 Gigabit / Gigabit / 100Base-TX. When connecting via 10 Gigabit LAN, a CAT 6A (up to 100m) or CAT 6 (55m) cable is required. The controller is Aquantia "AQC-100S", with a maximum packet size of 16,352 bytes (9,000 bytes for macOS), and supports features such as flow control, multicast filtering, IEEE 802.3az, and RSS. The body size is W79.5 x D114 x H27.2mm, weighs 240g, and the cable is 50cm long.