Baileygez5 years ago000Hi, I am really happy with the MK540, unfortunately I lost the USB receiver. Do you also sell only the (used) USB connector?Show in original language (German)matsutter5 years ago • purchased this product+110purchased this product Helpful answerLogitech Unifying EmpfängerCommentAnonymous5 years ago000The replacement receiver you are looking for is called "Logitech Unifying™ USB receiver". You may also be able to find a cheaper used one elsewhere (Tutti, Ricardo).Show in original language (German)Comment