Most people initially buy a KVM switch simply to share a monitor, keyboard, and mouse between multiple computers.
Then the setup gradually expands.
A webcam gets added for meetings. A wireless headset receiver stays permanently connected. External drives, USB microphones, printers, and gaming peripherals all start sharing the same desk environment, which raises a question many users only discover later:
Will every USB device actually behave properly through a KVM switch?
In practice, the answer depends on both the type of USB device and how the KVM handles USB communication internally.
Standard keyboards and mice are usually straightforward. Higher bandwidth devices, gaming peripherals, wireless receivers, and storage hardware can behave very differently depending on the USB implementation, switching method, and overall setup design.
This guide explains how USB devices work through a KVM switch, which peripherals are usually the most stable, and what to consider when building a smoother multi-device workspace.
kvm switch to share your USB Devices

Table of Contents

  • 👉 Part 1. How USB Devices Work Through a KVM Switch
  • 👉 Part 2. Which USB Devices Usually Work Without Problems?
  • 👉 Part 3. Which USB Devices Are More Sensitive?
  • 👉 Part 4. TESmert KVM Switches and USB Passthrough
  • 👉 Part 5. Final Verdict

Part 1. How USB Devices Work Through a KVM Switch

Most KVM switches separate USB connections into two different categories:
  • dedicated keyboard and mouse ports
  • and shared USB peripheral ports
The keyboard and mouse ports are usually optimized specifically for stable HID (Human Interface Device) communication. Their job is to keep basic input devices switching quickly and reliably between connected systems.
Shared USB ports behave differently.
These ports function more like a traditional USB hub, allowing devices such as:
  • printers
  • scanners
  • USB flash drives
  • webcams
  • microphones
  • or external storage devices
to move between computers together with the KVM.
Because different USB devices communicate in very different ways, compatibility and behavior can vary depending on:
  • bandwidth requirements
  • power draw
  • polling rate
  • driver behavior
  • and how the operating system handles USB re-detection during switching
This is why some peripherals reconnect instantly while others may briefly reinitialize after changing systems.

Part 2. Which USB Devices Usually Work Without Problems?

Standard USB peripherals are usually the easiest devices to use through a KVM switch.
Basic office-oriented devices such as:
  • wired keyboards
  • wired mice
  • printers
  • scanners
  • USB flash drives
  • and standard wireless receivers
typically work without any special configuration.
These devices generally require very little USB bandwidth and maintain stable communication even through USB 2.0 environments, which is why USB 2.0 KVM switches remain completely sufficient for many office and productivity-focused desk setups.
Keyboard and mouse compatibility can also improve significantly when the KVM includes dedicated passthrough support rather than treating input devices like generic USB peripherals.
Instead of fully emulating keyboard and mouse behavior internally, passthrough mode allows the connected systems to communicate with the actual devices more directly. This is especially useful for:
  • gaming keyboards
  • programmable mice
  • RGB peripherals
  • and higher polling rate input devices
which may not always behave correctly through traditional USB emulation alone.
kvm switch passthrough

Part 3. Which USB Devices Are More Sensitive?

Some USB devices place much heavier demands on the switching environment and are naturally more sensitive to reconnect behavior.
Webcams and USB microphones, for example, often reinitialize after switching systems because video and audio devices rely heavily on operating system driver negotiation.
Gaming peripherals can sometimes behave differently as well, especially in heavily customized setups involving:
  • RGB control software
  • macro systems
  • extremely high polling rates
  • or multiple layered USB devices
Wireless receivers may also vary depending on the manufacturer and how aggressively the device handles reconnect events after switching.
External SSDs and higher speed storage devices are also more bandwidth-sensitive than standard peripherals. While they may still function through USB 2.0 ports, transfer speeds will remain limited by USB 2.0 bandwidth.
Higher bandwidth devices such as:
  • external SSDs
  • capture hardware
  • and larger file transfer workflows
benefit much more from USB 3.0 environments where data throughput becomes more important.
In most real-world environments, stability improves significantly when the USB setup remains relatively simple and avoids unnecessary hubs, adapters, or chained USB extensions.

Part 4. TESmert KVM Switches and USB Passthrough

All current TESmert KVM switches include shared USB peripheral ports, allowing devices such as:
  • printers
  • scanners
  • flash drives
  • and other USB peripherals
to switch between connected systems together with the display and input devices.
TESmert KVM switches also include keyboard and mouse passthrough support, which helps improve compatibility with gaming peripherals, programmable keyboards, RGB devices, and higher polling rate mice that may behave inconsistently through traditional USB emulation environments.
Current TESmert models use USB 2.0 shared peripheral ports supporting up to 480Mbps bandwidth, which remains fully suitable for most standard desktop peripherals and productivity-focused workflows.
Future TESmert KVM models will gradually expand toward USB 3.0 5Gbps support for users working with higher bandwidth USB devices and more demanding workstation environments.

Part 5. Final Verdict

Most standard USB devices work very reliably through modern KVM switches, especially in setups focused on keyboards, mice, printers, and general desktop peripherals.
More advanced devices such as gaming peripherals, webcams, audio hardware, and external storage systems can behave differently depending on bandwidth requirements, driver behavior, and how the KVM manages USB communication during switching.
Understanding the difference between dedicated keyboard and mouse handling versus shared USB peripheral switching becomes increasingly important as desk setups grow more complex.
And if you're unsure whether a specific device will work properly through a KVM switch, the safest approach is usually to provide the exact device models to the brand’s technical support team. In many cases, experienced KVM support teams can confirm compatibility very accurately before purchase based on the full device list and workspace setup.

 

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