TECKNET Wireless Mouse, 2.4G USB Computer Mouse with 6-Level Adjustable 4800 DPI, Silent Quiet Click，30 Months Battery, Ergonomic Grips, 6 Buttons Portable for PC, Chromebook, Mac – Grey

【6 Levels Adjustable DPI & 6 Buttons】TECKNET wireless mouse has a 6-Level adjustable DPI (800/1200/1600/2400/3200/4800), which provides more sensitivity than standard optical mice for smooth and precise tracking on a wide range of surfaces.
【30 Months Battery Life】Designed with the upgraded independent power switches and sleep modes to minimize battery consumption, the wireless mouse can enjoy up to 30 months of use time with only 2 AA batteries (not included). 2X longer battery life than others.
【Silent Click】Silent clicking design for left and right button fits the circumstance for using wireless mouse for laptop in public, such as library, dormitory, office and any other occasions where you do not want to disturb others.