Our take
The BoTian BT-OTGU4MC-A is a four-port USB 2.0 Micro-USB OTG hub intended for compatible tablets. The seller claims charging alongside data, but host support and the unexplained 12V field remain unresolved.
A user with an older Micro-USB tablet that supports OTG who can verify the charging path and exact hub version before relying on simultaneous charging..
A USB-C laptop, a device without USB OTG host mode, a guaranteed charging rate, or a buyer seeking a documented external power rating.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Four USB 2.0 peripheral ports
- Micro-USB OTG form for compatible older tablets
- model and historic ASIN appear together in a product-specific catalog record.
What to weigh up
- Host support and charging pass-through are device-dependent
- power input field is unclear
- USB 2.0 is slow for modern storage
- Amazon page was unreadable.
Specifications and exact model details
The key details
| Model covered | BT-OTGU4MC-A |
|---|---|
| Host connector | Micro-USB OTG host connection is listed; the tablet must support USB host mode. |
| USB 3.x data ports | Four USB 2.0 data ports are described by the seller. |
| Installation | A tablet-oriented OTG cable hub, not a computer-model-specific mount. |
| Hub power | The seller's 12V field is unexplained; no confirmed auxiliary power arrangement is established. |
| Host charging | Simultaneous tablet charging is a seller claim; no universal host-delivered rate is documented. |
Performance figures are manufacturer claims. Source checked October 5, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
Use it to add USB-A peripherals to a compatible Micro-USB OTG tablet
The BT-OTGU4MC-A record describes a small OTG hub for older tablets with a Micro-USB host connection and four USB 2.0 peripheral ports. That can add room for a keyboard, mouse, flash drive or other compatible USB device where the tablet supports host mode. It is an older USB 2.0 design, so it is not the right choice for a fast external drive or a modern USB-C laptop setup.
Treat tablet charging pass-through as a compatibility check
The seller says the hub can pass charging while data devices are connected, and names several tablet families. USB OTG and charging pass-through are both host-dependent, so confirm the exact tablet, cable and power source before relying on simultaneous use. The listing does not establish a universal charge rate, and a charging claim should not be interpreted as four high-current charging outputs.
Keep the USB 2.0 limit in view
Four downstream ports make it easier to leave several accessories attached, but they share a USB 2.0 connection and do not equal four independent high-speed links. Use the hub for modest peripherals and occasional transfers. The seller record did not establish a USB 3.x mode, per-port throughput or a current tablet compatibility matrix.
Confirm the model and power path before ordering
The product record supplies a model/ASIN crosswalk but the Amazon detail page could not be read. The seller's 12V specification field is unexplained, so do not use it to select an adapter. Compare the offered product's Micro-USB OTG host cable and power connection with the tablet's documentation, and confirm that the listing says BT-OTGU4MC-A.
Treat OTG data and tablet charging as two separate compatibility checks
The product record describes a Micro-USB OTG connection for data devices and separately claims that a tablet can continue charging while those devices are attached. A tablet must first support USB host/OTG mode for the hub to expose its four USB 2.0 ports; charging pass-through is an additional condition that depends on the tablet, cable and exact hub version. Confirm both paths in the tablet's own documentation before planning to use the hub as a combined work-and-charge connection. The seller's compatibility examples name several Lenovo, Dell and Toshiba Windows tablets, but they do not prove support for every model in those families. The source also contains a 12V specification field with no explanation of its role, so it cannot be used to select a charger or infer a rated power input. Check the offered product's power connector and included accessories directly, and treat charging behavior as unconfirmed until the exact tablet and configuration are established. This model is for an older Micro-USB tablet routine, not a USB-C laptop dock or a multiport charging station. If you only need a keyboard and mouse on a compatible tablet, the four-port USB 2.0 layout can provide the connection count without changing the device into a modern USB-C hub. It still does not document a per-port charging current or four simultaneous charging outputs. Keep the host-side plug, data mode and power path separate when you compare it with other OTG accessories, and do not rely on the unexplained 12V field to choose a supply. Check that the tablet recognizes OTG devices before connecting a whole set of accessories, then confirm separately whether it can accept charge through the same arrangement. The saved seller examples are compatibility clues for named tablet families, not a universal list of supported devices. If simultaneous use is essential, verify the exact tablet and cable combination rather than assuming that another Micro-USB OTG hub's behavior applies to this model.
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Before you buy
How many USB data ports are listed?
The seller record describes four USB 2.0 data ports on the BoTian OTG hub.
Does it charge every supported tablet while moving data?
The seller claims simultaneous charging and data, but asks buyers to verify the exact tablet and cable.
Is it a USB-C laptop hub?
No; the listed host connection is Micro-USB OTG for compatible tablets.
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.
- Desertcart BoTian listing pairs the model with a four-port OTG hub and seller charging claim ↗ — checked October 5, 2026.
- Desertcart seller record pairs B07XMBVQ2R with BT-OTGU4MC-A and describes USB 2.0 ports and charging/data use ↗ — checked October 5, 2026.
- Amazon B07XMBVQ2R detail page returned an internal error; current listing remains unverified ↗Paid link · We may earn a commission. — checked October 5, 2026.
Is it the right fit?
Check the exact model and today’s offers on Amazon.