Top features: - Virtually silent so you won't disturb others - Comfortable ambidextrous design - Long battery life for going longer between battery changes Virtually silentThe Logitech M220 Silent Wireless Mouse is designed for near silent operation. With a 90% noise reduction, you can click away in the library, lecture hall or meeting without disturbing anybody.Its sound has been measured by an independent lab, and verified with by Quiet Mark - a seal of approval for its silent operation.Comfortable ambidextrous designThe M220 Silent Plus is designed for left and right hand use, offering comfort and precision for all.The compact size is ideal for popping in a bag to use on-the-go.Long battery lifeAn AA battery provides up to 18 months of battery life for long-lasting reliability, so you can use it safe in the knowledge its battery won't run out anytime soon.