Natural handshake position reduces muscular strain by 10%* Unique 57° vertical angle for an ergonomic grip and enhanced performance 4000 DPI high-precision sensor, resulting in 4 x less hand movement** Three connection options, USB-C charging cable,Logitech Unifying Receiver, or Bluetooth. Tested and certified by the AGR (Aktion Gesunder Rücken e.V) / Forum Gesunder Rücken / Bundesverband Deutscher Rückenschulen. * As compared with a traditional non-vertical mouse. ** As compared with a traditional mouse with 1000 DPI sensor. System requirements: Unifying: -Requirements: USB connection – Windows 10 or later, Windows 8, Windows 7 – Mac OS 10.13.6 or later Bluetooth: -Requirements: Bluetooth Low Energy technology – Windows 10 or later, Windows 8 – Mac OS 10.13.6 or later USB-C: -Requirements: USB connection – Windows 10 or later, Windows 8, Windows 7 – Mac OS 10.13.6 or later