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Lenovo 4X90K06975 ThinkPad OneLink+ RJ45 Ethernet Adapter — main product image
Lenovo

Lenovo 4X90K06975 ThinkPad OneLink+ RJ45 Ethernet Adapter

★★★★★4.7 (59 reviews)

Add a wired Ethernet port to your OneLink+-equipped ThinkPad for reliable network connectivity.

$29.99*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The Lenovo 4X90K06975 ThinkPad OneLink+ to RJ45 Adapter is a single-purpose accessory that converts a ThinkPad's OneLink+ port into a standard RJ45 Ethernet jack. For professionals who depend on stable, low-latency network connectivity — whether for large file transfers, video conferencing, or accessing corporate network resources — a wired connection is often non-negotiable, and this adapter delivers that capability in a compact form factor with an 8.6-inch cable.

Because this adapter uses Lenovo's proprietary OneLink+ interface, it is designed exclusively for compatible ThinkPad models and will not work with other laptops or connection types. This narrow compatibility is the key tradeoff: the adapter integrates seamlessly with supported ThinkPads but offers zero versatility beyond that ecosystem. For travelers and office workers with OneLink+-equipped ThinkPads, it provides a reliable and portable way to get online without depending on wireless networks.

Key Features

Package Dimensions: 22.2 cms (L) x 7.4 cms (W) x 22.2 cms (H)

Product Type: Electronic Adapter

Package Quantity: 1

Country Of Origin: China

Specifications

Brand
Lenovo
Model
4X90K06975
Interface
OneLink+ to RJ45
Cable Length
8.6 inches
Color
Black
Product Type
Electronic Adapter
Country of Origin
China
Package Dimensions
22.2 x 7.4 x 22.2 cm

Pros & Cons

👍 Pros

  • Provides a stable wired Ethernet connection, which is more reliable than Wi-Fi for demanding network tasks.
  • Compact and portable at just 8.6 inches, making it easy to carry for travel or office use.
  • Purpose-built by Lenovo for ThinkPad systems, ensuring reliable compatibility with OneLink+ ports.
  • Simple plug-and-play connection with no external power required.

👎 Cons

  • Only works with ThinkPad models that have a OneLink+ port, limiting compatibility to a narrow range of laptops.
  • The OneLink+ connector is proprietary, so this adapter cannot be repurposed for other devices.
  • Cable length of 8.6 inches may be too short if the Ethernet jack is not close to your workstation.
  • Does not add any other ports — it is solely an Ethernet adapter.

Frequently Asked Questions

This adapter works with ThinkPad systems that have a OneLink+ enabled port. Check your ThinkPad's specifications to confirm OneLink+ support before purchasing.
The adapter provides an RJ45 Ethernet connection for your ThinkPad. Lenovo's OneLink+ interface supports standard Ethernet speeds, but consult Lenovo's documentation for your specific model's maximum throughput.
The cable length is 8.6 inches, which provides enough reach to connect to a nearby Ethernet port without excessive slack.
In most cases, compatible ThinkPad systems running a supported version of Windows will recognize the adapter automatically, though Lenovo may provide updated drivers through their support site.
No. This adapter uses the proprietary OneLink+ connector, which is specific to certain Lenovo ThinkPad models. It will not work with USB, USB-C, or Thunderbolt ports.

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