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Transparent USB-C extension cable with LED-lit connectors

Fervit

Fervit USB4 40Gbps 240W Transparent LED Extension Cable

SKU CH-J46S-DT558

Extends a USB-C connection while delivering up to 240 W of power and 40 Gbps data, plus 8K video at 60 Hz through a transparent LED-lit cable

  • 40 Gbps USB4 data rate moves large files quickly
  • 240 W Extended Power Range charging powers demanding laptops
  • Transparent housing with LED indicator shows connection status
  • 8K 60 Hz video output drives high-resolution displays
  • Reversible USB-C connectors plug in either way

What this cable does

This USB4 extension cable carries data at up to 40 Gbps, delivers up to 240 W of power at 48 V or 20 V and 5 A, and passes 8K video at 60 Hz. It is built for users who need extra reach between a USB-C laptop and a dock, drive or monitor without losing bandwidth or charging speed.

Who it suits and who it does not

It suits owners of USB-C laptops such as Mac Pro models from 2018, 2019 and 2020, XPS and Chromebook devices that support DP Alternate Mode and need a reversible connector with visible LED charging indication. It does not suit buyers whose devices lack USB-C video output or whose monitors do not accept DP Alternate Mode over Type-C.

The deciding specification

The single figure that determines fit is the 40 Gbps USB 4.0 data rate combined with 240 W Extended Power Range delivery; if your host and display both support that throughput and power level, this cable will handle the link.

How it compares

Measured against everything we stock in USB Cords & Extension Cables, at today’s prices. Recalculated every night.

Price $15.99
Pricier than about 55% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameFervit

Questions about this item

Will the USB4 40Gbps extension cable need replacement if the LED indicator stops lighting up during charging?

The transparent LED is built into the connector housing and serves as a visual charging indicator; if it fails the cable still carries data and power, so replacement is only needed if the cable itself is damaged.

What limits the 40Gbps data rate when the cable is used continuously with a docking station?

Sustained 40Gbps throughput depends on both host and device supporting USB 4.0 and on cable length; the extension adds connector resistance, so the first limit is usually the host controller’s thermal throttling.

How much heat does the 240W power delivery generate when the cable runs all day at 48V 5A?

The cable is rated for Extended Power Range up to 240W; normal operation at full load produces warm connectors but no active cooling is required, and the transparent housing lets you inspect for discoloration.

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