TESmart4x1 HDMI KVM Switch 4K@60Hz 4:4:4 Ultra HD | 4 Port KVM Switcher 4 in 1 out with 2 pcs of 1.5 m KVM Cables Supports USB 2.0 Devices Control up to 4 computers/servers/DVR- Mystic Grey

Works like a dream, easy to setup, and DOES handle gaming pass through 3840x2160 to an LG Ultra HD 32" Screen. Switches seamlessly between three PC's and 1 Mac. Construction quality feels good when the metal boxed unit is picked up. All in all an excellent purchase and well worth the money. Quite the best there is. Buy it if you need a first class HDMI 2.0 KVM.

Worked very well when first purchased and was easy to set it up but has failed after 2.5 years. For the price I paid at that time (£243), i certainly expected this to last longer.As it is out of return window, i am unable to return it. Also I do not see a warranty period anywhere. I was hopping this would have a 3-5 year warranty.

I had a pretty unusual use case for this I guess - Mac mini, Work windows laptop which is completely locked down and XBOX One X on my desk, connected to a 4k monitor.I needed something so that I could share the one keyboard and mouse, but I needed a remote as I couldn't rely on software for hotkeys and had to have the KVM tucked away in a corner out of sight.And it's proved to be outstanding - no image quality degradation and it just works, flawlessly, week in week out.One thing to note - it supports 4k and HDR signals without issue, but I couldn't get it to work with Freesync. To be honest, that's not really caused me any issues, but worth pointing out.Great performance and value - I'd highly recommend.

Very pleased with this unit. So good to switch both hdmi and usb together.The one catch with all these kvms is how well they work with cordless mice and keyboards - especially the logitech unifying series. Having multiple machines with one keyboard is really helpful, but what often comes along with multiple machines, it multiple wires, so keeping this to the minimum is really helpful.Two cautions with this unit:1. If you use the unifying receiver in one of the the KVM USB KEYBOARD/MOUSE socket, you lose access to any special programming buttons you may have setup with the logitech software.2. If you use the unifying receiver in the generic USB socket you lose access to the ability to switch screens using scroll lock (though the special buttons above work).Good news is there's a workaround that gives you the best of both.1. Plug in one unifying receiver to one of the keyboard/mouse sockets. Ensure the keyboard is paired to this unifying receiver.2. Plug in a second unifying receiver to the USB socket (ideally using a USB hub then you get the benefits of all the other ports!) and pair the mouse to this receiver. You'll probably need to make sure you're doing this via the advanced unifying app to make sure you're connecting to the right dongle.Once you've done this, you'll still lose access to the media keys on the keyboard, but this might be easier to live with than losing access to the ability to switch screens using the keyboard, but any shortcuts you might have assigned to the mouse (for me it's using the left/right scroll to move a window nicely to the left/right of the screen) once again work.Logitech make great stuff, and I really didn't want to lose access to my cordless kit, and with this you don't need to.Overall, I recommend this unit, it's a bit of a suck it and see device since use cases are often very specific, but this has been a pleasing experience.Recommended!

Only had this product for a week but my first impressions are very good. Its case is metal case, with clear legends and the LEDs make clear which devices are powered and to which the monitor is currently connected . The device is around 20mm high and 300mm wides and fits between the legs of my monitor making a tidy setup with easy access to the controls. I particularly like the front mounted power switch so I can turn it off when not needed. So far the KVM switch works flawlessly with my mixed WIndows and Linux setup.

Doesn’t work with Surface Pro 4 Dock Station, the dock has to be plugged into a spare hdmi on the monitor. Would have been better off with a monitor with a built in KVM.2021 - Shares USB port pair (one above other) for my logitech mouse died. This leaves me with just a camera USB. Don’t buy unless desperate.

I had a different 'cheap Chinese' 4 port KVM from another company. This stopped working with my intel NUC after a firmware upgrade. I think it's to do with the HDMI protection signals not being passed.Anyway, I searched around for a replacement and found this one. I works straight out of the box. The only slight downside is that it needs to be plugged into a PSU for power, my previous KVM could be powered by one of the USB ports OR PSU.Im not working with 4k, but with a LG ultrawide monitor, but all is good with the PCs interacting with the monitor, and during switching.Very happy with the product.