Our take
The JUH340 is worth considering when the goal is four USB-A sockets, optional external hub power and a single USB-A host connection. It is a poor match for a USB-C-only computer unless the buyer adds a suitable adapter, and it does not replace an HDMI/PD/Ethernet dock. The product page describes the feature set; this review is not a hands-on test or a claim about the current Amazon offer.
A USB-A computer owner who wants three USB-A data ports plus a distinct charge-only socket and can verify the regional adapter package..
Skip it for a USB-C-only host without an adapter, a display or Ethernet dock, or a guaranteed combined multi-port power budget.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Four USB-A 3.0 ports are documented
- the official page separates the 2.1A charging port from three standard ports
- an adapter is listed in the package.
What to weigh up
- The host uses Micro-B-to-Type-A
- no video, Ethernet, card-reader or host PD function is listed
- the full simultaneous power budget is not specified.
Specifications and exact model details
The key details
| Model covered | JUH340 |
|---|---|
| Host connector | USB-A host through supplied Micro-B-to-Type-A cable |
| USB 3.x data ports | Three USB 3.x data ports; fourth USB-A socket is charge-only |
| Installation | Cabled hub with 60cm host lead |
| Hub power | Bus or self-powered; adapter included, regional rating varies |
| Host charging | No host USB-C PD pass-through listed |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
Four USB-A ports suit a simple peripheral setup
The JUH340 expands one computer connection into four USB-A ports. j5create lists USB 3.0 and an interface rate up to 5Gbps, with backward compatibility for USB 2.0 and older devices. That is useful for keyboards, mice, thumb drives and compatible storage when the computer lacks sockets. It is a data hub rather than a multiport laptop dock: the manufacturer does not list video, Ethernet, card reading or USB-C Power Delivery. A buyer choosing it for a monitor, network cable or one-cable laptop charging setup needs a different type of adapter.
One port has a separate fast-charge rating
The official table distinguishes one downstream port that supports battery charging up to 2.1A from the other three USB-A data ports. The 2.1A figure is a manufacturer rating, not a measured result, and the page does not give a full simultaneous power budget. If you plan to connect several power-hungry devices, use the supplied adapter and confirm the load requirements for each device rather than assuming the 2.1A rating applies to every port at once.
Choose bus or wall power for the workload
j5create lists both bus-powered and self-powered modes and includes an adapter in the package. The US/JP/TW adapter specification is 5V/3A; other regional plug versions have a different rating. This flexibility can help when a laptop port alone is not the preferred power source, but the hub remains a USB-A peripheral expander. It does not pass USB-C PD through to charge the host computer. Check the actual package and plug type if buying outside the region shown by the listing.
Check the host plug and lead length
The host side uses a USB 3.0 Micro-B socket and a Micro-B-to-Type-A cable listed at 60cm, roughly two feet. That makes it a better fit for a computer with a USB-A host port than for a newer laptop with only USB-C. The cable length keeps the hub near the computer; it is not a long desk-extension lead. The official page lists Windows, macOS and Linux support, while exact compatibility still depends on the attached device and host port.
Confirm the mapped JUH340 identity and regional package
Two reseller records identify historical ASIN B00HLOLQ6K as j5create JUH340, while the saved Amazon request returned a fetch error. That supports preserving the ASIN as a model clue without claiming a current offer. The official page is clearer about the product itself: a Micro-B-to-Type-A host cable, three data ports, one charge-only socket and an included adapter. Its adapter rating varies by region; the US/JP/TW specification is 5V/3A. Search by JUH340 and compare the exact package and port labels before relying on the adapter or charge-only port. That distinction matters if your setup has three storage devices plus a phone: only the three standard sockets are identified for USB data, and the 2.1A number belongs to the charging socket. The source does not give a total simultaneous budget, so the adapter's 5V/3A label should not be treated as 2.1A available independently on each connector. Choose it for the split layout only after checking the exact port markings and regional adapter.
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Before you buy
How many USB ports are downstream?
Four USB-A sockets: three data ports and one charge-only port.
Does it charge a laptop through USB-C?
No USB-C host-charging feature is listed.
Is the adapter included?
j5create's package list includes one; check the exact regional package.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources and review basis
Sources & review basis
We use the linked product documentation for the features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- j5create official JUH340 specifications and package list ↗ — checked October 4, 2026.
- Official model, port roles, 5Gbps link, power modes, included adapter and 60cm host cable ↗ — checked October 4, 2026.
- Reseller product identifiers map B00HLOLQ6K to JUH340 ↗ — checked October 4, 2026.
- Second reseller record maps B00HLOLQ6K to JUH340 ↗ — checked October 4, 2026.
- Historical Amazon page returned a fetch error; current offer status was not established ↗Paid link · We may earn a commission. — checked October 4, 2026.
Is it the right fit?
Check the exact model and today’s offers on Amazon.