The Macally RFNBMOUSEBAT is a rechargeable 2.4GHz wireless RF optical mouse with a 1000/1200/1600 DPI switch button, right and left click buttons and scroll wheel/button for precise and smooth control. The compact design makes it ideal for "on-the-go" workflow and the 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 RFNBMOUSEBAT for up to 28 days with 1 hour of active use per day. * No need to buy and replace batteries! The RFNBMOUSEBAT works both with Mac and PC and doesn?t require any driver. Features: 1000/1200/1600 dpi optical sensor for a precise and smooth control, 3 buttons and scroll wheel, Compact and ambidextrous design for maximum comfort, Stable 2.4GHz wireless RF technology (USB receiver dongle included), On/Off switch to save energy, Built-in 400mAh rechargeable Lithium-Ion battery, System requirements: Any computer with an available USB port; Mac OS X 10.1 and later; Microsoft Windows 7 / 8 / 10. BENEFITS: Stable 2.4GHz wireless RF technology (USB receiver dongle included), 3 buttons, scroll wheel and DPI switch (1000 / 1200 / 1600) to adjust sensitivity for more precise control, Built-in 400mAh rechargeable Lithium-Ion battery lasts up to 28 days with 1 hour of active use per day, Small size to be used as ideal travel companion, No down time. The mouse can be used while being charged.