Say goodbye to noise and hello to silence. Silent click switches and rubber covers, this mouse is truly silent. Ergonomic design with thumb support lets you work all day with ease Scroll wheel with adjustable DPI button lets you switch between 800, 1300 and 1600 DPR while back and forward buttons allow you to easily navigate between pages in your browsers. Blue LED technology allows you to point and click on more surfaces from glass tables to granite countertops. Connect with USB receiver. 2.4 GHz wireless technology. 1-year limited warranty. Uses 1 "AA" battery (included). Red.