Features: USB 3.0's RJ45 adapter USB 3 speeds fully support Gigabit Ethernet bandwidth. There is no RJ45 port such as the MacBook Air, ultrabook is compatible with thin laptops, and netbooks. USB power, no additional power adapter. Lightweight design makes it the perfect solution for applications that need to be portable. Backward compatible with USB 2/1.1 standard. Specifications: Integrated chip with USB 3 PHY and meets USB specifications for 3 controllers, 2 and 1.1. Supports IEEE 802.3az (Energy Saving Ethernet). IEEE 802.3 standard, and compatiblev 802.3ab, Will 10/100/1000Mbps Gigabit Ethernet MAC/PHY. Support all USB 3 power saving modes (U0, U1, U2, and U3,). Support USB super/high/full mains power supply or self-powered device automatic detection capability speed mode. High-performance packet transfer rates exceed those of USB buses using the proprietary burst transmission mechanism (US patent approved). System requirements: USB port for a Pentium III 800MHz or faster computer. 256 megabytes of memory or more. Windows ME / 2000 / XP / Vista / 7 / 8 Linux 2.4 kernel or higher. Apple OS 10.3 or higher. Package Included:1x Ethernet card Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 0.1-2cm measuring deviation due to manual measurement.