UGREEN USB 3.0 to RJ45 Adapter CR111 — Gigabit Ethernet, wired network adapter (black)

The UGREEN USB 3.0 to RJ45 Adapter CR111 provides Gigabit Ethernet connectivity through a USB port, offering a stable wired network option for devices without a built-in Ethernet jack. This compact black adapter supports 10/100/1000 Mbps speeds and is intended for laptops, mini-PCs and tablets that require a reliable wired LAN connection. The adapter uses a USB 3.0 interface to deliver higher throughput than USB 2.0 and fits easily into mobile work setups or home office environments.

Advantages

The adapter enables fast wired network access where integrated Ethernet ports are absent, reducing latency and improving stability compared with wireless connections. Its USB 3.0 interface supports Gigabit speeds and backwards compatibility with USB 2.0 ports. The compact design is easy to carry and install, and the plug-and-play setup eliminates the need for complex configuration on most operating systems.

Suitable for

• Connecting laptops or ultrabooks to a wired LAN for stable internet and file transfers
• Providing network access for mini-PCs and single-board computers without Ethernet ports
• Using tablets or convertibles in environments where Wi-Fi is unreliable or restricted
• Temporary wired connections in meeting rooms, home offices, or coworking spaces

Key specifications

• Interface: USB 3.0 (backwards compatible with USB 2.0)
• Network standard: 10/100/1000 Mbps (Gigabit Ethernet)
• Connector: RJ45 port for wired LAN
• Indicator: link/activity LED (device dependent)
• Color and form factor: compact black adapter, portable design

How to use

Plug the adapter into an available USB port on your computer, then connect an Ethernet cable to the RJ45 port and to your router or network outlet. On most systems the adapter installs automatically via plug-and-play; if necessary, install drivers provided by the operating system or the manufacturer. Once connected, verify the network status in the system network settings and configure IP or DHCP as required by your network.

Usage recommendations

For optimal performance use a USB 3.0 port and a CAT5e or CAT6 Ethernet cable to achieve full Gigabit throughput. Avoid stretching the cable or exposing the adapter to liquids and extreme temperatures. If the host device falls back to USB 2.0, expect reduced throughput compared with USB 3.0 speeds.