3-Year of Battery Life: This wireless optical mouse features an auto-sleep power-saving mode and on/off swicth so you can enjoy up to 3 years of charge. Designed for Comfort: Sculpted with comfort in mind, your wireless computer mouse fits naturally and ergonomically to your right hand. Controls are within your reach. Extra Productivity: Forward and Back thumb buttons let you quickly switch from page to page on the internet. Dual-mode scrolling lets you switch between speed and precision with a click so you can fly throug long files. Scroll at Hyper-Fast Speed: This cordless laptop mouse allows you to scroll quicker than ever before, remaining precise while navigating webpages and documents. Universal compatibility: One tiny unifying receiver pairs up to six devices, creating a convenient and clutter-free workspace. Just plug the receiver into your USB-slot and your mouse will be ready for use whenever and wherever the need arises. Compatible with any computer OS such as Windows or Mac