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Lenovo

Lenovo 4X90J31060 ThinkPad Port Replicator - VGA Ethernet

★★★★★4.4 (36 reviews)
1.5 in2.6 in0.6 in2.05 oz

One compact OneLink+ adapter adds VGA display output and Gigabit Ethernet to compatible ThinkPads — no dongle bag required.

$7.35*
✓ 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 ThinkPad Port Replicator (4X90J31060) solves a specific, common problem: OneLink+-equipped ThinkPads ship without a built-in VGA port or dedicated Ethernet jack, but many corporate and educational environments still depend on both. This adapter bridges that gap through a single proprietary OneLink+ connection, simultaneously enabling a wired display output and a physical network connection without occupying any of the ThinkPad's USB ports. At 1.5 x 2.6 x 0.6 inches and just over two ounces, it is effectively weightless in a laptop bag — the kind of adapter that lives permanently in a carry case and gets forgotten until it's needed.

The trade-off for that minimalism is scope. This is a two-port replicator, not a full dock — VGA and Ethernet are all it offers. Users who need USB expansion, audio output, HDMI, or multiple displays will need to look at Lenovo's larger ThinkPad docking station lineup. But for a road-warrior setup where the primary desk needs are a projector connection during meetings and a reliable wired network drop at a hotel desk, this adapter covers the requirement precisely without the bulk or cost of a full docking solution. Its OneLink+ dependency also means it's purpose-built: once you know your ThinkPad model is compatible, there are no driver headaches or compatibility questions to navigate.

Key Features

Video interfaces: VGA

Dimensions (WxDxH): 1.5 in x 2.6 in x 0.6 in

Weight: 2.05 oz

Specifications

Brand
Lenovo
Model
4X90J31060
Video Interface
VGA
Network Interface
Ethernet (RJ-45)
Host Connection
OneLink+
Dimensions (WxDxH)
1.5 x 2.6 x 0.6 inches
Weight
2.05 oz
Compatible Systems
ThinkPad 11E Chromebook, ThinkPad 13, ThinkPad X1 Carbon (20FB) and select OneLink+ models

Pros & Cons

👍 Pros

  • Extremely compact at 1.5 x 2.6 x 0.6 inches and 2.05 oz — adds virtually no weight or bulk to a ThinkPad travel setup.
  • Single-cable OneLink+ connection provides both VGA and Ethernet simultaneously without occupying USB ports.
  • VGA output covers virtually every conference room projector and legacy display without compatibility concerns.
  • Wired Ethernet connectivity provides a reliable, lower-latency network alternative to Wi-Fi in corporate environments with congested wireless.

👎 Cons

  • OneLink+ compatibility locks this adapter to a narrow range of specific ThinkPad models — it is not usable with USB-C or standard ThinkPads outside that ecosystem.
  • VGA is an analog, legacy interface — no 4K support, no HDCP, and image quality degrades over longer cable runs compared to digital alternatives.
  • Only two expansion ports total (VGA and Ethernet) — users needing USB hubs, audio output, or additional displays need a different solution.
  • No power pass-through means this adapter does not contribute to keeping the ThinkPad charged while connected.
  • At 2.05 oz, the adapter is light but the proprietary OneLink+ port means it's only useful with a specific laptop — it cannot double as a universal travel adapter.

Frequently Asked Questions

This adapter requires a OneLink+ port, which is present on specific ThinkPad models including the ThinkPad 11E Chromebook, ThinkPad 13, and ThinkPad X1 Carbon (20FB series). The OneLink+ connector is proprietary to select Lenovo ThinkPad lines — verify your specific model number supports OneLink+ before purchasing, as standard USB-C ThinkPads are not compatible.
VGA is an analog interface with a practical ceiling of 1920x1200 at 60Hz on most implementations, though the adapter's specific maximum resolution is not listed in Lenovo's published specifications. VGA does not support audio-over-display or HDCP content protection — it is suitable for presentations and extended desktop use but not for video playback to protected displays.
The adapter provides a standard RJ-45 Ethernet port. Lenovo lists it as Ethernet without specifying the speed tier in published documentation; at minimum it provides wired network connectivity, but confirm Gigabit capability in Lenovo's full spec sheet if 1Gb/s throughput is required for your use case.
The OneLink+ standard carries power delivery alongside data, so whether simultaneous charging works depends on the power source connected to your ThinkPad's main charging port. This replicator does not include its own power pass-through — it handles display and network only.
This is a port replicator — minimal, single-connection expansion focused on VGA and Ethernet only. A full docking station adds USB ports, audio jacks, additional display outputs, and often power delivery. If you need two monitors, USB peripherals, and audio on a desk, this adapter is undersized for that workflow. It is optimized for users who primarily need a projector connection and wired network at a meeting room or secondary desk.

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