Work in comfort all day with our premium wireless ergonomic mouse. Navigate precisely and access your most-used features with 3 programmable buttons. [1] Battery life may vary based on user and computing conditions. [2] Smart Switching not available on devices running Windows 10 S. [3] Customization requires download of the Mouse and Keyboard Center and is not available on devices running Windows 10 S or Mac OSX. [4] Does not work on clear glass or mirrored surfaces. [5] Available colors may vary by market. [6] Battery life may vary based on user and computer conditions. [7] Microsoft's Limited Warranty is in addition to your consumer law rights.