A KVM switch, short for keyboard, video and mouse, lets a single set of peripherals and a monitor control two or more computers, switching between them with a button press, hotkey or software shortcut. It is a simple idea that solves a common desk problem: needing access to more than one computer without cluttering the desk with duplicate keyboards, mice and monitors for each one.
What a KVM switch does
At its core, a KVM switch sits between your keyboard, mouse and monitor on one side, and two or more computers on the other. Switching input redirects the keyboard and mouse signal, along with the video feed, to whichever computer you select, so it appears on your monitor exactly as if it were the only machine connected. More advanced models can also switch shared USB devices such as webcams, headsets or external drives at the same time.
Who uses a KVM switch
IT administrators managing server racks are one of the most common users, since a KVM switch lets them control many servers from a single console without dedicating a monitor, keyboard and mouse to each one. Developers and testers who need to work across a primary machine and one or more test or virtual environments also rely on KVM switches to move between systems quickly. They are equally useful for anyone who needs to keep a work computer and a personal computer on the same desk without doubling up on peripherals.
Types of KVM switches
Basic KVM switches handle a single video connection, such as HDMI or DisplayPort, along with USB for keyboard and mouse, and are suited to switching between two computers at a desk. USB-C KVM switches have become more common as laptops standardise on USB-C, often adding power delivery so a connected laptop charges while docked. At the higher end, enterprise-grade matrix KVM switches, including the ATEN range we carry, support many more ports, longer cable runs with the help of extenders, and centralised control across large numbers of servers or workstations, which suits data centres and server rooms rather than a single desk.
What to check before buying
Video resolution and refresh rate support matter, since an older or basic KVM switch may cap out at a lower resolution than your monitor is capable of, resulting in a downgraded picture when switching. Check that the switch supports the number and type of USB peripherals you actually use, particularly if you rely on more than a keyboard and mouse. If your computers and monitor are not all sitting on the same desk, cable length becomes a factor, and this is where extenders come in, allowing a KVM connection to run much further than a standard cable would support. Finally, confirm the switch has enough ports for the number of computers you want to control now and in the near future, since adding a second switch later is more awkward than buying the right size up front.
KVM switches vs docking stations
It is worth distinguishing a KVM switch from a docking station, since they can look similar on paper. A docking station connects one laptop to multiple peripherals and monitors, expanding what a single computer can access. A KVM switch does the opposite: it lets multiple computers share one set of peripherals and a monitor. If you need to power up your desk setup with more ports for one laptop, a dock is the answer. If you need to control more than one computer without extra keyboards and monitors, a KVM switch is what you want.
Choosing the right switch
Start by counting how many computers you need to control and what video connection they use, then check the switch supports that resolution comfortably. Our KVM switches range includes both desktop-focused switches for two or three computers and ATEN's enterprise-grade options for larger, multi-server environments, so it is worth matching the model to the scale of what you are actually trying to control.