This is a very neat little mouse, ideal for smaller hands - it was too small for my husband but suits me very well. Windows 7 recognised it without problems. The shiny piano black carapace and blue light are very chic. The nano receiver is brilliant, just tucks into a USB slot. A previous reviewer's video usefully shows you where the receiver is hiding (inside the mouse itself), but failed to say what batteries were needed (AA - they look smaller in pictures, which is a bit misleading). The sensor is very sensitive - I had to remove my mouse mat which has a lot of pattern on it, because the cursor was just jumping everywhere. It's a good mouse, but there is no information about it at all in or on the box - eg the dpi button is not documented and I haven't the faintest idea what it does. If there had been a bit of documentation I would have given it 5 stars.