Aten Corp 4-Port USB-PS/2 KVM Switch for PC & Server Control - Ideal for Office, Data Center & Home Workstation Setup

If you're buying this for PS/2 support, honestly you need to look elsewhere.A rundown of some of the issues I've experienced (and yes, I even went through lengthy and unnecessary firmware upgrade for this unit which resolved a total of 0 of the following issues):USB Keyboard -> PS/2 Keyboard input: After about 10 seconds, I get stuck keys that won't un-stick unless I press them again. Games are unplayable using this combination.PS/2 Keyboard -> PS/2 Keyboard input: You'd think, wouldn't you. However = 0-key rollover. I'm dead serious. Any key presses immediately cancel the preceding keys held. Again, games unplayable.USB Mouse -> PS/2 Mouse: Overloaded PS/2 input. The DPI rating of literally any modern PS/2 mouse apparently is far too much for the PS/2 bus. PS/2 sends interrupt commands to the CPU which ask to be processed, so the DPI ratings of modern mice will very quickly overload any PS/2 system receiving them, unless the data is intelligently metered out to the PS/2 ports. Which, of course, it isn't using this device. The result is it actually can lock up the system until the mouse movement is processed, which yet again, makes even the most basic games unplayable. I have even had it cause stuck keys on physically attached keyboards.I had a support ticket out with the manufacturer which I've abandoned since it's been ignored for about a week. Chatting with another user of this same switch, I found that they told them "this unit is functioning as designed". So that's good.I 100% would avoid Aten products unless you're only using them to switch USB devices, and even then I would recommend against them for any gaming functionality unless explicitly stated in the manual that the devices support n-key rollover and have mouse DPI support ranges. Avoid for PS/2.This unit is absolute rubbish.It is totally fickle as what keyboard and mice it likes and will either not recognise 1 or both or mouse or keyboard or will act erratically.When using PS2 and USB Items together it causes my case fans to light up but not run until PSU is turned of then on again.It is not worth the money paid as it is not the versatile tool that is promised.. the whole concept is compromised..Seriously do not waste your money buying this crap.After trying my old KVM switch and a couple from different manufacturers, I tried Aten. The Aten device was easy to install and supports old and new PCs. I had ordered a power supply, but it is not really necessary. All PCs work without issue, unlike my experience with the other three KVM switches I tried. I have a USB wireless keyboard and a USB mouse connected and both work with any of the connected PCs.funktioniert genauso wie es soll, vor allem die Umschaltfunktionen und die erkennbaren Anzeigen, weil es als Desktopgerat eingesetzt ist. Bei Anbindung an USB ist das Netzteil nicht notwendigSuper Teil!Wann bekomme ich meine Rückerstattung?