MX Keys works via Bluetooth or with the "Logi Bolt" USB plug. The answer given by "Anonymus" below is not quite correct: "for Business" comes with a Logi Bolt USB plug, this product does not.

According to Logitech, the following are included: keyboard, Logi Bolt USB receiver, USB-C charging cable (USB-A to USB-C) and operating instructions

See source Logitech: https://www.logitech.com/de-ch...

Click on the plus on the right under "Technical data", scroll down to "Part number", where the manufacturer's serial numbers for the keyboard layouts and colours are listed!

The difference is exactly as some have already written. It does not need a Logi Bolt. Otherwise, from my point of view, almost exactly the same as the predecessor. I wouldn't have had to buy this one in the first place.

The only difference I think is that MX Keys for Business comes with a different receiver - the Logi Bolt.