Cross-Computer Control - Logitech Flow allows you to seamlessly control multiple devices and even copy-paste content and documents between those computers Tracks Virtually Anywhere - even on glass Rechargable Battery - Up to 70 days of power on single charge Dual Connectivity - Use with up to three Windows or Mac computers via included Unifying receiver or Bluetooth Smart wireless technology Speed adaptive scroll wheel auto-shift from click-to-click to hyper-fast scroll