This KVM seems like a good value for money. Here are some details I thought I’d share since I wasn’t sure about them the moment I bought it and not many people mention them:- Supports EDID emulation. That is, when you’re switched to one device the rest of the devices think the display is still attached to them, so they behave nicely, instead of shifting windows around as if you unplugged the external monitor.- HDCP is supported according to the nVidia Control Panel.- USB is 2.0. That’s okay. I don’t think there are many uses for USB 3.0 on a KVM. I don’t think storage devices should be used on a KVM, and you don’t need to switch a network adapter between computers, you just connect all the computers to the network with a normal ethernet switch.- The included cables have the HDMI and USB parts stuck together. That is nice because it keeps everything tidy. You can also separate the cables as much as you need. Now I want to buy the optional extra 2 cables.- LEDs are blue. Very bright, you know the type...- Runs very cool. Uses less than 5W.- The device is a little ugly but hey, there’s a desktop version also, a little prettier (comes in red, black or blue). I’m mounting it under the desk so I needed this version with the screw holes.- The “Online” LEDs detect when the USB cable from the computer to the KVM is connected, not the display cable.- Power brick doesn’t take additional space if your power strip is aligned the traditional way (like this = = = = = = ), big plus.- Remote doesn’t have a lot of range, but you never have to press a button twice. The thing I dislike about remotes powered by coin cells is that you seem to need to press the buttons multiple times for them to do something. This one has nicer quality buttons so whenever the remote is in range (is not as powerful as a TV’s) it’s going to work reliably. If the KVM is bolted under your desk, you’re going to have to point the remote under your desk.- If you ever run into issues with black/green screens after switching back and forth to one device, try using a different output or a different converter combination (see details below).- I have no idea what the M and P buttons do on the remote.—- USB COMPATIBILITY —- - Tested with Logitech Unifying Receiver that is connected wirelessly to a Logitech K850 keyboard and a Logitech M720 mouse - Hot keys work with this setup (you can press Scroll Lock twice then press PgUp/PgDown or 1, 2, 3, or 4 to select inputs). - Hot keys work only on the top row of numbers, not with the number pad. I think this applies to all keyboards. - The Logitech software (Logitech Options) will not detect your mouse and keyboard as Logitech if you are plugged into the KVM's mouse and keyboard USB ports. This is because the KVM connects directly to them and emulates a virtual mouse and keyboard and presents that to the computer. If you want Logitech Options or similar software to work, you have to plug the mouse into the third USB port, the one for devices. Hot keys don't work on that third port, though.—- VIDEO COMPATIBILITY —-- I found a compatibility issue using a Dell WD19 docking station and Apple devices. Both of these have a workaround, please read below. - 2020 M1 MacBook Air -> Dell WD19 docking station HDMI output -> TE Smart 4x1 KVM -> LG Ultrafine 25UM58 (resolution 2560x1080) —->>> NOT WORKING, display goes black or dark green after switching from this source to other source and back to this source. You have to disconnect and reconnect again. - 2020 iPad Pro 12.9” -> Dell WD19 docking station HDMI output -> TE Smart 4x1 KVM -> LG Ultrafine 25UM58 (resolution 2560x1080) —->>> NOT WORKING, display goes black or dark green after switching from this source to other source and back to this source. You have to disconnect and reconnect again.-This incompatibility CAN BE SOLVED if you use the Dell WD19’s other outputs. I tested this chain and it works: - 2020 iPad Pro 12.9” -> Dell WD19 docking station USB-C DP output -> Apple USB-C Digital AV Multiport Adapter ->TE Smart 4x1 KVM -> LG Ultrafine 25UM58 —->>> WORKS - It should work on the M1 MacBook also but I didn’t test; the computer was borrowed. - Other adapters could work too. I think that the WD19 has an internal HDMI adapter that doesn’t like the KVM for some reason. There seems to be a timing/sync issue because the display shows multi-color noise or static then goes black. Anyway, this setup is for one display output so you don’t lose anything by using an adapter on the other port.I tested these and they worked and also worked after switching back and forth: - Dell Latitude 5300 -> Dell WD19 docking station HDMI output -> TE Smart 4x1 KVM -> LG Ultrafine 25UM58 - PC with RTX 2060 native HDMI output -> TE Smart 4x1KVM -> LG Ultrafine 25UM58 - PC with CableCreations DisplayLink USB to HDMI adapter -> TE Smart 4x1KVM -> LG Ultrafine 25UM58 - 2020 M1 MacBook Air -> Apple USB-C Digital AV Multiport Adapter -> TE Smart 4x1KVM -> LG Ultrafine 25UM58 - 2020 iPad Pro 12.9” -> Apple USB-C Digital AV Multiport Adapter ->TE Smart 4x1 KVM -> LG Ultrafine 25UM58 - 2014 MacBook Air -> generic Mini DisplayPort to HDMI adapter -> TE Smart 4x1 KVM -> LG Ultrafine 25UM58 - 2020 M1 Mac Mini via native HDMI -> TE Smart 4x1 KVM -> LG Ultrafine 25UM58--- AUDIO ---The 3.5mm audio output works this way: it intercepts the signal from the selected HDMI input and it outputs the oudio for that selected input. I'm not sure if the monitor also receives the signal. The audio quality is better than my monitor and better than my Raspberry Pi 3B. The output doesn't have any hiss or noise, which is great. I don't normally expect these types of products to have good sound.Note that Apple devices can't adjust HDMI volume for some reason. It's Apple's fault though. Very frustrating.I will be adding more devices as I test them (Raspberry Pi 3B, Raspberry Pi 1B, generic DisplayPort adapter on the WD19 dock instead of Apple USB C adapter, etc.). I can’t test HDR support.To be honest I’m glad I found a workaround for the Apple + WD19 incompatibility, because this KVM is very very nice and that would have been a dealbreaker. I don’t think it’s the KVM’s fault given it worked with everything else so I’m giving it 5 stars.Was pretty skeptical of buying this after reading some mixed reviews but I decided to give it a go. My 4 connected devices are:- USB-C Macbook Pro 13 (work) with HDMI and USB connected through the official Apple multimedia dongle- Macbook Pro 13 (2015 model) directly connected HDMI and USB- Windows 10 VM running on Unraid with HDMI connected to a GTX 1080 and USB connected to Fresco Logic USB 3 card- Unraid Linux box with HDMI connected directly to the intel integrated graphics on the and USB to an integrated USB portFor the monitor I have an LG ultrawide running at 2560x1080 @ 60Hz and I have a Logitech GPro keyboard and G502 mouse.Cons:+ Might as well cover the cons first, since there's really only one major one. The Logitech G Hub software is VERY hit or miss. A few times its worked, sometimes it just says "connecting" forever and never works. On Mac it did nothing, and on windows it kindof works. If you plug the mouse/keyboard into the non mouse/keyboard ports logitech always sees it but you lose hotkeys and it disconnects/reconnects on each pc change. I got around this by storing the Logitech settings in the Onboard Memory of each device and then just plugging them into the KVM keyboard/mouse slots. I don't regularly reconfigure these, so it was ultimately a really small price to pay.+ Only other con, is that occasionally things connect a bit weird or get out of sync. The biggest culprit of this I have seen is on the USB-C mac. If you try to connect to a non-Apple branded USB-C switch things don't work very well at all, but using the Apple branded USB-C to Multimedia adapter things generally are pretty smooth, although sometimes the mouse appears to not work on a reboot. Generally clicking the power off and on resolves most issues, and issues have been fairly infrequent.Pros:+ This thing is awesome. The EDID emulation works VERY well with my monitor and resolution. I get true 60HZ output from all devices and switching takes maybe a second or so. I previously had some other switches/KVMs and had huge lag especially when toggling between the macs and windows. Also the EDID emulation prevents the mac auto-locking all the time when toggling monitors.+ The "hotkey to select input" is simply amazing. Hitting Scroll twice and the number to select a different input is a legitimate game changer. I can now quickly flip between all the devices cleanly.+ The audio passthrough also works very well. I have a small soundbar hooked up to the 3.5mm output and the HDMI switches very cleanly 90% of the time. Occasionally I get a slight "pop" sound, but its not that loud, and I haven't had any issues or lag with audio, so really happy here also.+ Its nice they provide a regular USB port, although I probably won't typically use it. It does allow normal USB passthrough, so thats appreciated.+ The keyboard and mouse passthrough for the most part works really well (minus the caveats in CONS). I can use all the special functions on my Logitech GPro keyboard such as volume and multimedia keys, and everything I normally do works as expected. After finding out about onboard memory in Logitech, the loss of GHub really isn't a big deal anymore.+ Buttons on the switch work well and are easy to press if you need them.+ Blue lights are noticeable, but definitely not over-bright. I've had quite a few devices with LEDs that are borderline blinding in the dark, but these while easily visible won't blind you in a dark room at all. I really appreciate they chose a more dim LED.I haven't used the remote or the mouse to switch functionality at all, and likely won't, but thats not a con for me, as I just don't need it. This KVM really exceeded almost all of my expectations, and the cons are definitely able to be worked around and I can live with them. This KVM isn't cheap, but its also not the most expensive out there. If you're in a WFH environment and need to quickly switch and can keep the cables managed this is definitely a great option to consider!This is a review for the TESmart model HKS0201A2U - 2 in 1 out single display third generation.My old KVM did not support EDID and this caused windows to re-arrange everytime I switched computers. Probably 1 time in 50 it caused my windows laptop to blue screen. Switching time was 3~5 seconds. I tried a variety of EDID simulators with no luck because the odd resolution wasn't supported even by the ones that 'learned' the current EDID info.The new KVM has none of these issues and switches in under a second. I have 2 laptops connected to a 38" AW3821DW monitor. I run both with the internal display and the external connected to the KVM is running at 3840x1600 at 85Hz. Connected keyboard is a Corsair K95 and the trackball is a Kensington wireless Expert mouse. All keyboard functions work with no issues, same with the trackball.Everything runs great with no issues so far and I would highly recommend it.I need to buy some slightly longer cables, but that is my issue.I really liked the features, like where it would leave the machines on the KVM thinking the devices were still attached even when switching machines. I was starting to have trouble with it, needing to do power cycles and the like to keep it running the way it should. Switched up to a monitor that has a built in KVM, but I miss the KVM implementation this device had so much!