I have 4 raspberry pi's I'm using this for. Two rpi Zeros, a 3 and 4.

Works ok as there is a slight delay when switching between them. I may have to select and select another and come back to the first one I selected, but much easier than disconnecting and reconnecting cables. Makes my life much easier when I need to troubleshoot them.

Not bad for the price. The included cables are pretty beefy. Instructions are ok

hdmi did not work on one of my pc. however overall performance great.

This 4-port switch worked fairly well for 2 years 2 months until it stopped working. There was a little frustration in that it occasionally didn't switch properly. When this happened I kept switching between different inputs and sometimes had to disconnected and reconnected the cables. This always got it working again but it was somewhat of a pain, especially when I was in a hurry to do something. Note: I was always using the remote control and never tried to see if the switches on the device worked better.

All in all I think this is a fairly good switch for its price. So much so, I purchased a second one when the first one died. I just wish the switch lasted longer.

This is technically a basic and dumb electronics switch. It turns on/off connectivity from the 3 USB ports and 1 HDMI input over to one of the 4 HDMI/usb combo ports on the back. It acts basically like connecting and disconnecting the devices from the PC in question. Windows will have a freak out and move your apps around when you plug it in. If you use it for a primary display, it most likely will work pretty well (but make to set the switch to the correct PC before turning the PC on). For extended displays apps will get reshuffled off the switched display to the primary display. This is annoying but acceptable for what the device actually does and the cost. It is itself a USB hub and can handle down-stream USB hubs as well (i.e. from a monitor that takes keyboard & mouse USB and is itself a hub).

Casing is pretty cheap plastic and the buttons don't feel all that "quality". But they're plastic buttons in a plastic case on a pretty simple circuit board whose job is simply to switch all the various wires from one connector to another. Wire it up, route the remote near the keyboard, and leave the box hiding somewhere and never touch it.

It is powered by the HDMI ports, so no need for an extra power connector. Very nice.

It comes with 4 HDMI cables with one end being HDMI & USB. No idea if they would work as regular HDMI cables, but they are actually well built. They're also long enough (1.5M or just under 5-ft). (I think the cables might be higher quality than the switch box itself.)

Best use case: If you were manually moving an HDMI and USB cable to swap your monitor/keyboard/mouse from one pc/laptop to another, then this is exactly what you're looking for. (I'm even typing this through the switch right now.) Would probably work well to switch a bunch of consoles or media servers connected to a TV, especially if they support a keyboard input.

This is not an automatic switch and doesn't read key-combinations. Its just a basic switch. But it does exactly what it needs to do if all you need to do is pull out a couple of cables between devices.

The only question might be how long it would last. It's not dealing with anything more than the 5v from hdmi and USB, there's not that much there to burn it out. Have to wait an see. (Literally just got it today and hooked up a couple of laptops to figure it all out.) Will have to update if it burns up prematurely.

Hands down, a five star device. I will break this review down into two parts.
Part one will be a review of the product, and part two will be a review of the vendor.

The Product:
This product does exactly what it says it will do. It will switch your keyboard, mouse,
monitor (and peripherals plugged into it) between four different computers.
In my case I have a Windows 10 Pro 64 bit desktop, a Windows Home 32 bit edition laptop,
a Linux machine, and my wife's laptop plugged into it.
On my side of the device I have a USB dongle for my wireless combo keyboard and mouse
plugged in, a flash drive, and specialty printer. And of course my HDMI cable goes to my monitor.

The included remote extension switch box is a very nice plus. My desk is against the wall so
that let me drop the main connection box behind the desk out of sight and only leave the little
remote switch box on my desk saving tons desk space (and hiding a wiring rat's nest).
I was particularly pleased that the remote switch had lighted buttons to indicate which computer was active.

I use this in an office environment and have not tested its capabilities with multimedia or gaming.
I have had this installed for about a month now and it has been very dependable.
Ocassionally it will fail to auto switch to a new computer coming online but that seems to be quite normal
with most HDMI switchers that I have used. So no stars reduced or that. I just switch it manually.

The Company

Five Stars as well. My order ran into a couple of hiccups that required their help.
The first order showed "shipped" but then promptly disappeared into abyss. The company immediately sent a replacement.
When I received that shipment one of the cables seem to be a bit questionable. I contacted the company about it,
and they sent a full product replacement to me without questions.

I have no way of knowing, but I sensed that the company was a fledgling company and they were working very hard
to make things right, and make a positive company image. Their struggle with English was obvious (understandably),
but I think patience and perseverance on both ends were the keys to a successful transaction.

My "Thanks" to them.................5 Stars