Logitech K340 Wireless PC Computer Keyboard / Unified Receiver Bundle - Very Rare This is the K340, which appears to be an exceptionally rare wireless keyboard from Logitech. It uses the modern Logitech Unified Receiver, and runs on 2 AA batteries. The receiver is included, but no batteries, software, or anything else. It was tested with Windows 7 and it works fine. Again, this seems to be a pretty hard to find and popular keyboard. It has some wear from age and normal use, as you can see, and is missing the adhesive cork "feet" on the underside. See pictures for details.