Kensington Pro Fit® Mid-Size Wireless Mouse Ruby Red, Optical, RF Wireless, 1600 DPI, Red Kensington Pro Fit® Mid-Size Wireless Mouse Ruby Red. Movement detection technology: Optical, Device interface: RF Wireless, Movement resolution: 1600 DPI, Buttons quantity: 3, Scroll type: Wheel. Product color: Red http://www.maclife.com/article/reviews/kensington_pro_fit_midsize_mouse_review While Apple's Magic Mouse lets you do a few multi-touch gestures, I've never liked how it felt in my hand, and I hate how it scrolls — I'd much rather have a real scrollwheel for navigating the long pages of text I read day in and day out. When I plugged ... Really small receiver. Comfortable. Nice colors. Great battery life. Inexpensive. Not for lefties. Can't reprogram all the buttons