JSAUX Upgraded Docking Station 4K@120Hz for Steam Deck and Handhelds

In this review the JSAUX Upgraded Docking Station proves to be a practical accessory for handheld PC gamers who want a simple way to move to a big screen. It is aimed at owners of Steam Deck LCD/OLED, ROG Ally and Ally X, Legion Go and Go S, and MSI Claw who need a compact hub that delivers 4K@120Hz video alongside wired networking and fast charging. The single biggest reason to buy is the upgraded HDMI 2.1 output that supports 4K at 120Hz for noticeably smoother external gameplay compared with a 60Hz dock.

Key Features

• 4K@120Hz HDMI output: Provides a much smoother external display experience for fast-paced games and cinematic cut-scenes, reducing tearing and motion blur compared with 60Hz output.
• 100W PD charging: Supports full-speed 100W power delivery to keep handhelds charged during intense sessions and to support Turbo Mode on compatible devices.
• Gigabit Ethernet: Offers a reliable wired connection for online play, faster downloads and lower latency than Wi-Fi alone.
• Three USB 3.0 ports: Adds USB-A expansion for controllers, storage or other peripherals with USB 3.0 transfer speeds.
• Expanded handheld compatibility: Works with Steam Deck LCD/OLED, ROG Ally/Ally X, Legion Go/Go S and MSI Claw so one dock can serve multiple devices.
• Compact 6-in-1 design: Combines video, power, Ethernet and USB ports in a single small hub to simplify living room or desk setups.

Who It's For

This dock is best for handheld PC gamers who want a plug-and-play way to connect to a TV or external monitor and who value high refresh rates for competitive or visually demanding titles. It also fits users who need a stable wired network for downloads and multiplayer sessions, and who run peripherals from a few USB-A ports.

It is less suitable for handheld owners who rely exclusively on wireless peripherals or who need a wider variety of ports like SD card slots or USB-C device passes beyond the listed functions. Also note it is not compatible with ROG XBOX Ally or XBOX Ally X models.

Pros & Cons

Pros

• Delivers true 4K@120Hz HDMI output for smoother big-screen gameplay.
• Supports up to 100W PD charging to maintain battery during Turbo Mode play.
• Built-in gigabit Ethernet improves stability and download speeds over Wi-Fi.
• Solid build quality and good value for combining multiple functions in one compact dock.

Cons

• Some users report mixed connection reliability and occasional signal issues with certain setups.
• Does not include extra expansion such as SD card reader or additional video outputs beyond the single HDMI 2.1 port.

Specifications

Product type	6-in-1 docking station
HDMI output	HDMI 2.1 supporting 4K@120Hz
Power delivery	Up to 100W PD
Ethernet	Gigabit Ethernet
USB ports	3 x USB A 3.0
Compatible devices	Steam Deck LCD/OLED, ROG Ally/Ally X, Legion Go/Go S, MSI Claw

Our Verdict

The JSAUX Upgraded Docking Station is a sensible, well built hub for handheld PC gamers who want high refresh external video, fast wired networking and reliable charging in one compact unit. It represents good value for anyone who regularly docks a Steam Deck, ROG Ally or Legion Go and needs smoother 4K@120Hz output, though a few users may encounter occasional connection quirks depending on their setup.

Frequently Asked Questions

Will this dock charge my handheld while gaming?
Yes, it supports up to 100W PD charging and can maintain charge during heavy use, with 100W recommended for full Turbo Mode support where applicable.

Which handhelds are supported?
The dock works with Steam Deck LCD/OLED, ROG Ally and Ally X, Legion Go and Go S, and MSI Claw; it is not compatible with ROG XBOX Ally or XBOX Ally X.

What video output can I expect?
The HDMI 2.1 port supports up to 4K at 120Hz for smoother gameplay and reduced screen tearing on compatible external displays.