JSAUX 4K@120Hz Docking Station — HDMI 2.1, 100W PD, Ethernet

The JSAUX 4K@120Hz Docking Station converts handheld gaming PCs into full-featured desktop stations with HDMI 2.1 video, gigabit Ethernet, three USB 3.0 ports and 100W pass-through charging.

If you own a ROG Ally, ROG Xbox Ally/Ally X, Steam Deck (LCD or OLED), Legion Go, MSI Claw or similar Windows/SteamOS handheld, this compact 6-in-1 dock gives you the ports needed for TV/monitor play, wired networking and desktop accessories without juggling cables. The design lifts and widens the base to accommodate protruding grips and thicker cases, while HDMI 2.1 and 100W Power Delivery keep visuals and performance in sync with modern gaming demands.

How does this dock improve video and display performance?

The dock supports HDMI 2.1 output and can deliver up to 4K at 120Hz, enabling high-frame-rate gameplay on compatible TVs and monitors. That benefit is especially noticeable in fast-paced shooters and racing titles where smoother motion and reduced input lag matter most.

• 4K@120Hz HDMI 2.1 output for high-refresh external displays
• Backward-compatible with 4K@60Hz and lower resolutions
• Suitable for TVs and gaming monitors with HDMI 2.1 inputs

Will it keep my handheld charged and running at peak performance?

The docking station provides up to 100W pass-through Power Delivery so handhelds can stay charged while running Turbo or high-performance modes. For best results pair it with a 100W USB-C charger — the dock passes that wattage through to supported devices for sustained power.

• 100W PD pass-through supports heavy-duty gaming loads
• Maintains battery and performance during extended sessions
• Compatible with charging profiles of ROG Ally, Steam Deck, Legion Go, and similar devices

What connectivity does it offer for accessories and networking?

Three USB 3.0 ports at up to 5Gbps let you attach keyboards, mice, external SSDs and controllers for a full desktop experience, while the integrated gigabit Ethernet port provides low-latency, stable internet for competitive play. This combination makes the dock a small but capable hub for both work and gaming.

• 3x USB 3.0 ports for peripherals and fast external storage
• Gigabit Ethernet for stable, wired online play
• Plug-and-play connectivity—no complicated drivers required

Is the dock compatible with my handheld and case?

The base is widened and raised to fit devices with protruding grips or thicker protective cases, supporting a wide range of handheld gaming PCs. JSAUX designed the hub to work with both Windows and SteamOS handhelds, reducing the need for multiple docks across devices.

• Fits ROG Ally, ROG Xbox Ally/Ally X, Steam Deck (LCD/OLED), Legion Go and similar models
• Supports handhelds with grips and thicker exterior profiles
• Universal approach—one dock for many handheld gaming PCs

Who is this for? The JSAUX 4K@120Hz Docking Station is aimed at handheld gamers who want a simple, reliable way to turn their portable PC into a living-room setup or desktop workstation. It’s especially useful for competitive players seeking high refresh rates, streamers who need wired networking and content creators who want quick connections to external drives and peripherals. If you want a compact hub that balances future-ready video, fast charging and practical I/O without bulky adapters, this dock is built for that workflow.