Review on Perixx PERIPRO-401 PS2 USB Cable Cord Adapter for Keyboard and Mouse – Enhanced Connectivity for PS/2 Interface Devices, KVM Switch Compatible, Black by Adam Hogan

Only used for keyboard, not tried with mouse. Worked well with the keyboard, except for one thing: when cycling through application windows, if I stopped using Ctrl+Tab while holding those keys, the highlighted window was automatically selected. I've tried different keyboards to see if it makes a difference and it doesn't. I ended up buying a similar adapter from another manufacturer and it worked correctly (doesn't switch to the highlighted window until I release the buttons). The rest of the Perixx works great with the legacy keyboard.