Our take
CG-MIC4P31HVV is an industrially oriented USB hub for a fixed installation that needs a Type-B host link and external variable-voltage power. Its connectors and mounting make it a poor fit for an ordinary travel dongle.
An integrator needing four USB-A peripherals, an industrial DC input, and a small surface-mounted hub with matching Type-B host equipment..
Skip it when you need a USB-C host, an included power adapter, or a consumer hub with monitor, card-reader, or laptop-charging functions.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Coolgear gives a model-specific upstream/downstream port map
- The hub accepts 7–48V DC through a two-pin terminal
- Steel case, surface mount, and 15kV ESD protection are listed
What to weigh up
- The host connector is Type-B, not USB-C
- The power supply is sold separately and DIN-rail clip is optional
- The historical Amazon ASIN is not mapped to the manufacturer's model
Specifications and exact model details
The key details
| Model covered | CG-MIC4P31HVV |
|---|---|
| Host connector | USB Type-B upstream connector; four USB Type-A downstream ports |
| USB 3.x data ports | Four USB 3.2 Gen 1 ports rated by the maker up to 5Gbps |
| Installation | Steel enclosure; surface mounting listed; DIN-rail clip is optional |
| Hub power | 7–48V DC input through a two-pin terminal; power adapter sold separately |
| Host charging | Downstream charging is listed at up to 1.5A/7.5W per port; no host USB-C PD is listed |
Performance figures are manufacturer claims. Source checked October 15, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
A compact hub for installed equipment
Coolgear describes CG-MIC4P31HVV as a micro-sized industrial hub for places such as offices, labs, warehouses, and automation equipment. It uses a steel chassis and offers surface mounting, so the appeal is a fixed installation with controlled cabling rather than a pocket hub for a laptop bag. The maker's construction claims are specifications, not proof of a particular drop or durability test. Check enclosure dimensions and mounting clearance before placing it in a control panel or machine.
Match the Type-B data link and DC power separately
The product page identifies one Type-B upstream port and four Type-A downstream ports. Its two-pin terminal accepts 7–48V DC, and the power adapter is sold separately. Those are distinct connections: the Type-B cable carries the host data link, while the terminal supplies external DC power to the hub. Check the required supply voltage, polarity, and wiring against Coolgear's diagram. Do not substitute a USB-C phone charger or an arbitrary barrel adapter based only on the voltage range.
Four Type-A ports share a 5Gbps interface generation
Coolgear lists four USB Type-A downstream ports under USB 3.2 Gen 1 with a maximum of 5Gbps. The specifications also give a downstream current figure of 1.5A (7.5W) per port and name charging protocols for connected devices. The page does not describe a combined current budget for all four ports, so do not assume the maximum can be delivered to every attached device at once. The 5Gbps figure is an interface ceiling, not a simultaneous transfer benchmark. The product is not a USB-C hub, and a buyer should account for upstream compatibility as well as the number of downstream sockets.
ESD and mounting details support a specific installation role
The manufacturer lists 15kV electrostatic-discharge protection and mounting options for a wall or surface; DIN-rail installation requires an optional clip. ESD is a defined maker specification, not a promise of protection from every surge, grounding issue, or wiring fault. Follow the manual for power and ground connections, and confirm whether the mounting accessory is included in the package being offered. These details matter more to a fixed installation than to someone seeking an extra USB port on a commute.
The old ASIN does not establish a current Amazon listing
Coolgear's official page and data sheet identify CG-MIC4P31HVV, but neither maps the model to historical Amazon ASIN B07JZ6BM7J. The saved Amazon detail page could not be inspected. Search by the exact model and verify the Type-B host, four Type-A ports, two-pin input, and any separately sold supply or clip. This review uses the manufacturer specifications and does not claim that the historical ASIN is a current exact offer.
Choose it for a matching industrial power and port plan
This model may suit a system integrator who already has a compatible Type-B host connection and needs a small mountable four-port hub powered from a documented DC supply. It is a poor fit for a laptop needing USB-C, HDMI, Ethernet, card reading, or host PD. Its useful difference is the broad DC input range and installation options; the trade-off is a specialized connector and supply arrangement that need deliberate planning. Confirm the exact model label and accessories before purchase.
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Before you buy
How many downstream data ports are listed?
Coolgear lists four USB Type-A downstream ports and one separate Type-B upstream connection.
What power input does the hub use?
It takes 7–48V DC through a two-pin terminal; Coolgear says the adapter is sold separately.
What current does Coolgear list per port?
The product specifications give up to 1.5A or 7.5W per port; the combined four-port budget is not stated.
Is the DIN-rail clip included?
Coolgear says DIN-rail use requires a separate optional clip; verify package contents for an offer.
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.
- Coolgear CG-MIC4P31HVV official product page ↗ — checked October 15, 2026.
- CG-MIC4P31HVV identity, port directions, interface rate, 7–48V two-pin input, per-port current, steel housing, ESD, and mounting ↗ — checked October 15, 2026.
- Technical data sheet for model-specific port, variable voltage, and mounting details ↗ — checked October 15, 2026.
Is it the right fit?
Check the exact model and today’s offers on Amazon.