The USB Vertical Optical Mouse with 5 function keys is definitely a sensational experience for anybody. The minute you grab the mouse, it just feels so right. Its ergonomic design makes it fit into your palm perfectly while all the keys are just at the place where you want them to be. In addition to the left, right keys and scroll wheel, it also comes with page up and down keys on your left for you to navigate through pages. The USB Vertical Optical Mouse is a great upgrade for your existing mouse and a cool gift to give away to friends.