The Macally BTEZMOUSEBATB is a rechargeable Bluetooth wireless optical mouse with a 800/1200/1600 DPI switch button two soft-click buttons and scroll wheel/button for a precise and smooth control. The ergonomic and ambidextrous design offers maximum comfort to both left-handed and right-handed users and helps to increase productivity. The 400mAh built-in rechargeable battery will power the BTEZMOUSEBAT for up to 2-3 months before next charging is required.* No need to buy and replace batteries anymore! The BTEZMOUSEBATB works both with Mac and PC and doesn?t require a driver. FEATURES: 800/1200/1600 dpi precision optical sensor for precise and smooth control 3 buttons and scroll wheel Ergonomic and ambidextrous design for maximum comfort Bluetooth wireless connectivity up to 10 m (30 ft) On/Off switch to save energy Built-in 400mAh rechargeable Lithium-Ion battery* System requirements: Bluetooth enabled computer; Mac OS X 10.6 and later; Microsoft Windows 7/8/10 BENEFITS: Bluetooth wireless connectivity up to 30 ft/10 m no driver required) 3 buttons scroll wheel and DPI switch (800 / 1200 / 1600) to adjust sensitivity for more precise control Built-in 400mAh rechargeable Lithium-Ion battery lasts up to 2-3 months of use (at 8 hours of daily use)* On/Off switch to save energy System requirements: Bluetooth enabled computer; Mac OS X 10.6 and later; Microsoft Windows 7/8/10 SYSTEM REQUIREMENTS: Bluetooth enabled computer Mac OS X v10.6 or later Microsoft Windows 7/8/10 Chrome OS.