MOKiN UC0304 / JP-HUB-83 Display Hub review

The MOKiN UC0304, preserved in the JP-HUB-83 documentation lineage, is an earlier USB-C multiport configuration for a computer that needs several kinds of connection around an external display. Its useful details are more specific than a “triple display” headline: HDMI 1 is limited to 4K30, HDMI 2 can reach 4K60 with the required host, and the charging description separates 100W input from an 87W laptop ceiling. Choose it around an exact operating arrangement, especially when more than one external screen is involved.

Start with the computer's video capability

The original UC0304 leaflet requires USB host/OTG capability and a computer connection that supports video output. For 4K at 60Hz, it specifically requires DisplayPort 1.4 with HBR3 capability. A USB-C port that only transfers data is insufficient. The instructions distinguish DisplayPort 1.4 and 1.2 source arrangements rather than promising the same video result from every USB-C-shaped socket.

The documented computer setup includes Windows 10 graphics settings and a MacBook recommendation to use macOS Catalina 10.15.1 or later for compatibility. That is useful historical operating guidance, not exact evidence for every newer Mac chip. This assessment treats the UC0304 as an earlier documented configuration and does not turn an old identifier into a current retailer offer.

The HDMI sockets are not interchangeable

HDMI 1 supports up to 3840 × 2160 at 30Hz. HDMI 2 is documented at up to 3840 × 2160 at 60Hz when used separately with a DisplayPort 1.4 source, or 4K30 with a DisplayPort 1.2 source. The DisplayPort output is also described with source-dependent single-output limits; the Chinese specification on the same original sheet explicitly identifies 4K60 for DisplayPort 1.4 and 4K30 for DisplayPort 1.2.

For someone using one monitor at a time, this means choosing the correct socket is part of setup. Connecting a suitable 4K60 screen to HDMI 1 does not give the higher HDMI 2 capability. A buyer requiring two 4K60 displays together cannot qualify from these separate single-output maxima.

The original Windows extended-desktop instructions illustrate different content on an HDMI display and a DisplayPort display. That supports a two-external-desktop arrangement with those connector types on a suitable Windows system, but the inspected operating text does not establish an exact uniform resolution and refresh rate for that simultaneous mode. It qualifies a flexible two-screen requirement, while a specified two-screen 4K or refresh-rate minimum remains unconfirmed.

The same leaflet marks its extended-desktop and collage multi-output arrangements as unsupported by Apple. Additional external outputs showing the same content count as one independent external desktop in this assessment. A Mac buyer should choose another documented solution when two independent external desktops are essential; three video sockets alone do not establish that result.

Use data connections according to their labels

The original instructions identify USB 3.0 data at up to 5Gbps and separate USB 2.0 data at up to 480Mbps. Those are different port capabilities. A slower connection suits many ordinary input devices, but it should not be treated as another 5Gbps drive connection. Data and other connected functions still share the route back to the computer.

The retained textual evidence establishes those two data-port classes without a complete reliably readable physical count for each class. We therefore do not use an inherited three-port headline to qualify a specific three-port minimum. The reviewed plan counts only one positively identified connection of each documented class. A buyer who needs several fast USB-A sockets should obtain the exact port map or choose a hub whose required count and rate are unambiguous.

SD and microSD access are documented, but simultaneous use of both formats is not established. The original card-rate figures are affected by the card itself and are not our measured transfer results. Choose this configuration for access to either format; a direct card-to-card workflow needs an explicit simultaneous-reader arrangement.

Charging is better specified than the headline

The leaflet explicitly separates a 100W PD input from a maximum 87W available for charging the connected device. That supports a stated laptop-power requirement up to the documented ceiling when the computer, charger and cable support the arrangement. It does not establish that a suitable charger is included. The USB-C PD socket is a power input, rather than a spare USB-C data connection.

The instructions give troubleshooting steps for a missing video signal or HDMI audio, including checking host video support, cable connections and the selected audio device. That makes the UC0304 most useful to a buyer willing to verify the exact older configuration. Choose it for a documented single-output mode or a flexible Windows HDMI-plus-DisplayPort workspace; choose another dock for confirmed high-resolution simultaneous screens, independent Mac displays or an exact large fast-port count.