Cross-computer control: The ability to use Logitech Flow to copy and paste text, images, and files between three computers while navigating the game fluidly Two-way connectivity: Utilize Bluetooth Smart wireless technology or the included unifying receiver with up to three Windows or Mac computers and laptops. Scrolling extremely quickly: Navigate lengthy documents or webpages more quickly and effortlessly. For more accurate navigation, you can also shift to click mode by pressing the wheel. Wireless technology: More sophisticated Wireless technology operating at 2.4 GHz 4000 dpi works anywhere. The dark field sensor tracks perfectly almost anywhere, including on glass. The mouse's measurements are 1.3 x 2.4 x 3.9. Receiver for unification: 0.2 x 0.5 x 0.5 inches Battery that can be recharged: Power for up to 70 days on a single charge