You can use this separate USB Unifying receiver to replace a lost receiver. It is compatible with all Logitech Unifying products (look for the Unifying logo for compatible products).

As the products you indicate are part of the Unifying range, it is compatible.

Yes, it's completely compatible.

Yes, it is compatible.

I'll have to see, but with my K800, MX and M720 mice it works perfectly.