DockCase's $149 Mount Ling 2 Pro Puts Capture and 4TB NVMe in One Dock

DockCase is asking $149 for its Mount Ling 2 Pro, a Kickstarter dock that combines a game capture card, an M.2 slot for up to 4TB of NVMe storage, and a charging stand for handhelds such as the Steam Deck and Switch 2. The company calls it the world's first "smart creator dock," a claim that is only partially true. AVerMedia's X'TRA GO already offers a stand, capture and extra ports for $160. The M.2 slot is the genuine differentiator here, and the only one that matters.

The base Mount Ling 2 costs $109 during the early bird window, rising to $199 at retail. The Pro version starts at $149 and lands at $249, with the internal capture card as the sole difference between the two.

What does the dock actually offer?

The dock connects to a handheld over a 10 Gbps USB 3.2 Gen Type-C link, and DockCase ships a braided 40 Gbps cable with two right-angle connectors in the box. That single connection carries:

• Up to 100W of USB-C power delivery
• Gigabit Ethernet
• HDMI 2.0 at 4K and 60Hz
• One USB 3.2 Gen 2 Type-A port
• One USB 2.0 port
• Optical audio output as a bonus

On the Pro model, a second USB-C port becomes the capture card output. The reviewer missed a 3.5mm jack, a port handhelds no longer carry themselves.

The plastic shell measures 8.4 x 7 x 3.5 inches and, in the reviewer's words, is "filled with more air than hardware." A silicone layer rests on top, with grooves for most handhelds and a deep central cut shaped for the Switch and Switch 2. Mounting points under the dock accept 2280, 2242 and 2230 drives, and a single 40mm fan with rear and side venting cools them. The fan adjusts its speed automatically, or manually, or not at all.

There is no room for a heatsink. The drive face sits nearly flush against the vented bottom cover, and most heatsinks would prop the dock past its rubber feet.

How fast is the storage?

Not very. The 10 Gbps USB link bottlenecks speeds down to typical PCIe 3.0 territory. In CrystalDiskMark, with a 2TB WD_Black SN770 installed — a PCIe 4.0 drive rated for 5,150 MB/s sequential reads on a motherboard — the dock managed roughly 820 MB/s in both directions, with far lower random performance. Thunderbolt 5 enclosures can exceed 5,000 MB/s. For handheld game storage, that is a reasonable trade.

The touchscreen works with minimal lag. It shows HDMI, SSD and power status at a glance, plus SSD SMART data, USB status and HDMI transfer modes in the full settings menu. Lighting options are bare: blue, red, or a gradient, with dimming and a rear button that kills every light including the screen.

Is the Switch 2 support real?

Partly. Nintendo does not allow external SSD storage, so the slot is dead weight on that platform. The reviewer needed multiple emails worth of troubleshooting to get HDMI passthrough working at all, and the dock must be fully connected before the host, with the Switch 2 already unlocked and plugged into the bottom USB-C port. The top port will not work. Connected in the wrong order, the dock forced itself into a reboot and sometimes failed to find the Switch 2 on return.

The Steam Deck, by contrast, worked seamlessly, and Windows handhelds are unlikely to trouble the standard connections. Steam Deck users must enter desktop mode to partition the drive and create a game folder.

Capture works within the 4K60 ceiling of HDMI 2.0, but DockCase ships no capture software. The dock appears as a plain video capture device in OBS or similar tools, unlike the packaged suites from Elgato and AVerMedia. Firmware updates arrive over USB, which DockCase will need, and which Nintendo system updates may force.

The verdict is straightforward. Owners of both a PC handheld and a Switch 2 get genuine value from one box. Pure Switch 2 owners would be better served by the official dock and a separate capture card.