BENFEI USB 3.0 2-Computer 4-Device Switch Review: Check Cables and Power First

This review analyzes published product information. We have not performed hands-on testing of this unit.

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One set of USB peripherals, two computers

The BENFEI USB 3.0 Switch is intended for a desk where a work computer and a personal PC need access to the same USB accessories. This exact configuration connects two computers to four shared USB devices, with a button to change the selected computer. Its appeal is straightforward: fewer occasions to unplug a keyboard, mouse or other peripheral when moving between systems.

This is a specification-based assessment of the retailer listing, not a hands-on test. The most important buying considerations are less about the advertised speed than about the host cables, supplemental power and what the product actually switches. Although the listing uses KVM terminology, the supplied specifications establish USB sharing, not monitor switching.

The specified configuration

Check the host connections before installation

Start with the two computers, rather than the accessories. BENFEI explicitly says the switch works only with its USB-A-to-USB-A cable. Treat that as a compatibility requirement, not an invitation to substitute any cable with matching plugs. The supplied evidence does not establish the number or length of host cables in the box, so verify both before planning the cable route across a desk.

A computer with only USB-C ports deserves particular caution. The listing does not establish compatibility through USB-C adapters or docking stations. Nor does the supplemental USB-C power connector establish a USB-C host connection. Confirm a supported connection path before choosing this switch for a USB-C-only laptop.

BENFEI claims driver-free operation for the switch and names several operating systems. Windows 11 is not explicitly included in the supplied list; that is an unanswered compatibility question rather than proof of incompatibility. Also, driver-free switching should not be read as a promise that every attached printer, scanner or specialist peripheral needs no software on either computer.

A practical setup sequence

1. Choose the shared devices. Count the accessories that need to follow you between computers. A keyboard and mouse would leave two of the four listed peripheral ports available.
2. Confirm the host cabling. Arrange the BENFEI-required USB-A-to-USB-A connections to both computers, following the product’s supplied connection instructions.
3. Plan supplemental power. For devices BENFEI identifies as higher-demand, including hard drives, USB cameras and headphones, arrange a suitable supply for the stated 5V 3A USB-C power input. The adapter is not included.
4. Connect and check each peripheral. Select one computer with the button, check the LED indication and confirm that the intended devices are recognized. Repeat on the second computer before relying on the arrangement for work or play.

This sequence separates host-connection questions from peripheral and power questions. The listing does not specify reconnection time after switching, so leave that as something to verify with your own devices rather than assuming an instant transition.

What the speed and power claims mean

The advertised transfer capability is up to 5Gbps. That is a stated ceiling, not a measured file-copy result. BENFEI mentions USB flash drives and external hard drives as use cases, but the evidence does not explain bandwidth allocation across all four ports. Do not interpret four USB 3.0 ports as a guarantee that four storage devices can each sustain the advertised rate simultaneously.

For removable storage, a sensible operating precaution is to finish transfers and safely eject the drive on the active computer before changing hosts. The switch is described as sharing peripherals between computers; it is not established as a direct computer-to-computer file-transfer connection.

Supplemental power is another planning point, not merely an optional extra to ignore. BENFEI recommends it for its examples of higher-consumption devices. However, the listing gives no per-port power budget and no quantified charging capability. The 5V 3A input specification therefore should not be treated as a promise of a particular charging output at every device port.

What it cannot be assumed to fix

This switch addresses repeated USB reconnection. It is not an evidenced solution for changing monitor inputs, extending a display or connecting multiple computers to one screen. Buyers wanting a complete single-button display-and-peripheral changeover need video specifications that are absent here.

For a gaming desk, keyboard and mouse support is listed, but polling-rate support, switching latency and compatibility with vendor-specific features are not documented. There is no basis to promise unchanged behavior for every specialist gaming peripheral. Likewise, listing cameras and headphones as supported device categories does not establish compatibility with every model.

If your setup planning also includes carrying a handheld separately from the desk equipment, our Nintendo Switch carrying-case guide covers that different accessory category; it does not establish console compatibility for this USB switch.

Verdict: useful sharing, with prerequisites

The BENFEI two-computer, four-device USB 3.0 switch is a plausible fit for sharing desktop USB accessories through a physical selector. Its clearest limitations are the specified host-cable restriction, the separate power-adapter requirement for powered setups and the absence of verified video-switching functionality. Confirm those points—and any specialist peripheral requirements—before treating it as the missing piece in a two-computer desk.

Sources: BENFEI USB 3.0 Switch retailer listing. Product specifications and compatibility statements above are listing claims, not independently measured results.

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