Logitech announced two new premium mice, the Logitech Performance Mouse MX and the Logitech Anywhere Mouse MX. Both mice feature Logitech Darkfield Laser Tracking, which allows you to use your mouse virtually anywhere you want – including clear glass (minimum 4 mm thickness) and high-gloss surfaces. Both mice are expected to be available in the U.S. and Europe beginning in August. Product marketing manager Greg Dizac recently recorded a video about Darkfield technology and the new mice.