If you have two computers and one good monitor, you have probably already discovered the problem. Swapping cables works until you do it twice a day. Then you start looking at KVM switches, and immediately hit a wall of model numbers that all look identical.
TESmart has been in this category since 2004 and produces one of the widest ranges available. Here is how to navigate it.
What a KVM switch does
Keyboard, Video, Mouse. One switch, multiple computers, one set of peripherals. Press a button or a hotkey and your monitor, keyboard and mouse move from one machine to the other.
The concept is simple. The execution is where things go wrong, and where the price differences live.
The range, by what you are connecting
Single monitor, two to four computers. The entry point. HDMI or DisplayPort, resolutions up to 4K at 60Hz, with hotkey and button switching. If you have a work laptop and a personal desktop sharing one screen, this is your section.
Dual monitor. The most popular category, and the one most people actually need. These let a second computer share both of your monitors, extending across them properly rather than mirroring. TESmart covers this heavily with HDMI, DisplayPort and mixed-input models.
Triple monitor and beyond. Available, using DisplayPort 1.4 for the bandwidth.
Rackmount and enterprise. 8-port and 16-port units with RS232 and LAN control, IP control, auto-scan and IR remotes. This is server-room equipment rather than desk equipment.
The range, by what you are pushing through it
This matters more than port count, and it is where money gets wasted.
4K at 60Hz covers most office and general use. Plenty of TESmart models sit here and they are the affordable end.
4K at 144Hz is the gaming tier. HDMI 2.1 models support this, along with VRR, ALLM and Dynamic HDR — the features that matter if you are switching a gaming PC and a console or work machine through one high-refresh display.
8K at 60Hz sits at the top, using DisplayPort 1.4 with DSC compression. Backward compatible with 4K at 60, 120 and 144Hz.
Buy for the display you own, not the display you might buy. An 8K-capable switch on a 1440p monitor is money spent on nothing.
EDID emulation, and why it matters
This is the feature that separates a switch that works from one that infuriates you.
EDID is how a monitor tells a computer what it is capable of. On a basic switch, when you switch away from a computer, that computer loses its display and decides the monitor is gone — so it rearranges your windows, resets your resolution, and generally causes chaos. Switch back and everything has moved.
EDID emulation keeps feeding each connected computer the correct display information even when it is not the active one. Nothing rearranges. TESmart includes this across its range, including per-port emulators on multi-port models.
If you take one thing from this article: do not buy a KVM switch without EDID emulation. The cheap ones that lack it are cheap for this reason.
Docking models
Several TESmart switches double as docking stations, adding USB 3.0 hubs, Gigabit LAN and charging. If your setup involves a laptop that you want to connect with one cable — display, peripherals, network and power — these are worth the premium over a plain switch.
There are also hybrid USB-C models designed for mixed setups where some machines connect over USB-C and others over HDMI or DisplayPort.
Compatibility notes
TESmart specifically targets mixed-device setups involving Thunderbolt, DisplayLink, MST and DP 1.4. That matters because Mac and PC mixed environments are where cheaper switches tend to fail, particularly with Thunderbolt docks in the chain.
If you are running a Mac alongside a PC, or anything involving DisplayLink, check the specific model's compatibility notes rather than assuming.
Support and warranty
TESmart runs a membership programme offering an extended warranty beyond the standard one year, plus trade-in credit against upgrades and technical support. Registration has to happen within the original warranty period, so if you buy one, register it immediately rather than filing the box away.
Which one do you need
Answer three questions and the model picks itself:
How many computers, and how many monitors? This narrows you to a category.
What resolution and refresh rate does your monitor run? Buy to that, not above it.
Do you want USB hub and network built in, or just switching? Docking models cost more and are worth it for laptop setups.
Then confirm EDID emulation is present, and check compatibility if Macs or Thunderbolt are involved.
Before you order
KVM switches discount regularly, and the price spread between models is wide enough that a code can move you up a tier. Current verified TESmart offers are on our sister site, Discountsmaniac's TESmart page.
Anita Hills writes about consumer products and the practical business of buying them well. She covers home fitness, pool and garden equipment, desk hardware, automotive parts and personal care, with a focus on what a product is actually like to live with rather than what its spec sheet claims.
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