Lenovo 4X90S91831

Overview

The Lenovo 4X90S91831 is a USB-C to Ethernet adapter designed to provide a reliable wired network connection for USB-C enabled laptops and devices. It supports Gigabit Ethernet with data transfer speeds up to 1 Gbps, ensuring fast and stable internet access for tasks like large file transfers, HD streaming, and working in areas with weak Wi-Fi signals. Its compact and lightweight design makes it easy to carry and use in both professional and home environments.

Key features

• USB Type-C to RJ-45 connector enables quick and easy access to wired networks without needing built-in Ethernet ports
• Supports Gigabit Ethernet (1000Base-T) for high-speed data transfer and smooth network performance
• Compact and lightweight design fits comfortably in laptop bags and workspaces without adding bulk
• Plug-and-play functionality allows for hassle-free setup without additional drivers or software
• Sleek black finish complements professional and personal setups
• Compatible with Microsoft Windows 7 and 10, making it versatile for various systems

Key specs

• Data transfer speed: up to 1 Gbps
• Connector type: USB Type-C to RJ-45 Ethernet
• Ethernet standard: Gigabit Ethernet (1000Base-T)
• Compatibility: Microsoft Windows 7 and 10
• Weight: 0.1 lbs

Connectivity and compatibility

This adapter bridges modern USB-C devices with traditional wired networks, making it a practical solution for laptops and tablets lacking Ethernet ports. It supports standard RJ-45 connections, ensuring compatibility with most wired networks found in offices, schools, and homes. The adapter works seamlessly with Windows 7 and 10, providing a stable connection for a wide range of applications.

Ideal uses and environments

The Lenovo 4X90S91831 is well suited to professionals and students who require a dependable wired internet connection for video conferencing, file sharing, and streaming. It fits well in home offices, corporate environments, and classrooms where Wi-Fi may be unreliable or unavailable. Its portability also makes it a convenient tool for IT technicians and remote workers who need quick access to wired networks on the go.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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