A4Tech OP-620D-U1

This mouse is fantastic if you have applications which require a lot of double clicking - using the 2x button which is small and rectangular just to the left of the scroll wheel, you only need to single click it! I primarily use Linux (Ubuntu) and it works perfectly there, I have also tested it on Windows XP. I suffer from hand and wrist problems so anything which streamlines my computer use is good for me. I find that I can't click the 2x button then move instantly away, I need to wait another micro second or so, but it is still much faster and less effort than two normal clicks. It's also an optical mouse - no more messy roller balls which get clogged with gunk!

When I receive the mouse, there was a fault with this item. Contacted the seller,and they gave good feedback to resolve this issue