Philips Professional Wireless mouse SPK7507B The Philips 5000 series mouse features 3200 adjustable DPI and low-battery warnings. It combines productivity with comfort, and makes working or playing more enjoyable. Buttons last millions of clicks for durability Reduced click sound, for a quiet and comfortable experience Plug-and-play wireless for convenience High-definition optical tracking for smooth control High-definition optical tracking for smooth control, teh mouse can be used on pretty much any flat surface Comfortable ergonomic mouse design feels great ergonomic design to suit the shape of your hand and reduce fatigue