This article covers Cable Matters 20Gbps USB4延長ケーブル1m.

Overview

The Cable Matters USB4 Extension Cable (model B0CNY9NJ4B) is a USB-C male-to-female extension cable designed to extend the reach of existing USB-C or Thunderbolt cables. At 1 meter in length, it supports full 40Gbps data transfer speeds, preserving the bandwidth of USB4 and Thunderbolt 4 connections. This cable also supports up to 240W Power Delivery, making it suitable for charging high-power laptops and tablets while extending the cable run. It handles 8K@60Hz and 4K@240Hz video output, so you can reposition monitors without sacrificing resolution or refresh rate. The reversible USB-C connector ensures hassle-free plug orientation.

Connectivity & Compatibility

The extension cable uses a USB-C male-to-female design. You plug it into the end of a standard USB-C or Thunderbolt 4 cable to gain extra length. It is backward compatible with USB 3.2 Gen 2x2 (20Gbps), USB 3.2 Gen 2 (10Gbps), and USB 2.0, so it works with a wide range of devices. Compatible devices include laptops, tablets, smartphones, monitors, and docking stations with USB-C ports. However, when using this extension, the total combined cable length (original cable + extension) should stay within recommended limits (around 2 meters for USB4/Thunderbolt 4) to avoid signal degradation. Longer runs may reduce data rates or cause instability.

Product Info

Cable Matters is a US-based accessories brand known for reliable cables and docks. This extension cable is available on for approximately ¥1,899 (tax included), making it an affordable solution for extending high-speed USB-C connections. Positioned in the mid-to-high-end accessory market, this cable is one of the few options that maintains full 40Gbps bandwidth while extending a USB4 or Thunderbolt 4 link. The manufacturer offers a limited warranty; check the official site for details.

Best Use Cases

This cable is ideal for users with Thunderbolt 4 laptops (such as MacBook Pro or ThinkPad X1 Carbon) who need extra reach between their laptop and a docking station. It consolidates data, video, and charging into a single extension, keeping your desk tidy. It is also great for anyone using 8K or high-refresh-rate 4K monitors via USB-C. The 40Gbps bandwidth ensures no loss in image quality or frame rate, allowing flexible monitor placement. Finally, if you own a high-power gaming laptop that requires 240W charging, this cable can handle the load. Just remember that the total charging speed is limited by the weakest link in the chain — if your original cable supports only 100W, the extension won't increase that limit.

Product Disclosure (Amazon)

  • Manufacturer: Cable Matters
  • Seller: Cable Matters Japan
  • Fulfilled by: Amazon
  • ASIN: B0CNY9NJ4B
  • Note: This article covers a manufacturer-made product based on Amazon listing details.