Ultra-fast, precise, quiet MagSpeed electromagnetic scrolling Comfort shape & intuitive thumb controls App-specific customization speeds up workflow Flow cross-computer control across multiple screens Darkfield 4000 DPI sensor for precise tracking on any surface, even glass Multi-device + multi-OS compatibility Pair up to 3 devices via Bluetooth Low Energy or Unifying USB receiver Switch between devices with the tap of a button USB-C rechargeable - up to 70 days of power per full charge; up to 3 hours of power with quick one-minute charge