Specification: Model: RC2503, RU2503 (optional) Chip: RTL8156B Color: Dark Grey Body material: aluminum alloy Interface types: Type-C-RJ45, USB3.0-RJ45 (optional) Transmission speed: 2500Mbps System support: Windows 11/10/8/7/Vista, XP, MAC OS X, Linux Operating environment: operating temperature 0-85, relative humidity 5-90; Storage temperature -10-95, relative humidity 0-90 Features: Supports 10/100/1000/2500M Ethernet, supports hot swapping Network standards: IEEE 802.3, IEEE 802.3u, IEEE 802.3az, IEEE 802.3ab, IEEE 802.3bz Packaging size: about 112 * 93 * 20mm/4.40 * 3.66 * 0.78inch Gross weight: 66g Note: 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! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Network card 1 x Instructions 1. 2.5G Network Card: With a speed of 2500Mbps, high-speed Ethernet, backward compatibility, downward compatibility with gigabit and gigabit Ethernet. 2. Support Systems: for compatible with Apple Mac OS, Windows, Linux, etc. (for compatible with Apple Mac OS, Win8/10/11 system drive free, plug and play, Windows XP/Win7 requires driver installation). 3. Stable Internet Access: The RU2503 USB3.0 network card is suitable for wired connections to desktop PCs, laptops, and other devices, providing convenient and stable internet access. Comply with IEEE 802.3 standard; Supports automatic flipping and recognition of network cable sequence, with a wired transmission rate of up to 2500Mbps, providing stable network connectivity. 4. Support: Supports 10/100/1000/2500 Mbps automatic recognition. Supports automatic MDIX (direct and cross network cable automatic detection), and the power supply supports full duplex high-speed data exchange. Support full duplex and half duplex operation modes, support sleep mode and remote wake-up through connection and packet magic wake-up function.