Lenovo 4X90F84315 ThinkPad Ethernet Extension Cable

The Lenovo 4X90F84315 is an Ethernet extension cable created for ThinkPad owners who need the dependability of a wired network even when their laptop lacks a built-in RJ-45 port. By converting the microUSB connector on select ThinkPad models into a standard Ethernet jack, it delivers a stable link for tasks that demand low latency, high security, or consistent bandwidth.

Set-up is instant. The adapter requires no drivers, so you simply plug it in and start working. An 80 mm cable keeps your desk free of extra clutter while still providing enough reach to connect comfortably. With support for a 5 Gbps transfer rate, PXE boot, and Intel vPro, the cable aligns with enterprise requirements for remote management, image deployment, and hardware diagnostics.

This makes the 4X90F84315 especially useful for IT professionals who image large fleets, consultants who frequently move between client sites, or travelers who prefer the reliability of a wired connection in hotel rooms and conference centers. Compatible systems include popular ThinkPad lines such as the X1 Carbon, L380, and Yoga series, so owners of these ultrabooks can enjoy Ethernet performance without carrying a bulky dock.

• Converts a microUSB port to a standard RJ-45 Ethernet interface
• Supports data transfer rates up to 5 Gbps
• PXE boot and Intel vPro compatibility for enterprise deployment and management
• Works with select ThinkPad models including X1 Carbon, L380, and Yoga systems
• Driver-free plug-and-use operation
• 80 mm cable length offers portability while keeping connections tidy