Review on Enhanced MANHATTAN 4 Port KVM Switch – USB Support with Audio & Microphone Functionality – Optimize Multimedia System Management on Computer & PC – Model 151269 by Garon Tafolla

Exactly what I needed. However, if you have a Corsair keyboard, forget about using it with this KVM switch (some cheaper ones with 2 ports will work, but I wanted one with 4 ports). However, you can connect a keyboard to any computer on the switch and have another keyboard in KVM and it will work like a champ, no problem. The mouse works great. The sound works although it only works on my Linux connected devices and not on Windows devices. I do not know why. I will be fully installing Linux on all my devices so this is a great product. Really fantastic. Also note that this thing doesn't need a network connection to work. However, there is a 9V DC port, so you can buy a 9V power adapter for $10. It just makes sure you're covered if there's a lot of power being sucked out of this thing. I've owned it for two days so as long as it doesn't blow through in 6 months this recall stands.