Wide rubberized backlit scroll wheel of 8 mm width Specially invented teflon formula ensures excellent gliding. Thanks to enlarged feet surface, balanced feet height and optimal place the mouse moves strictly horizontally 2 customizable thumb buttons allow to adjust mouse for its user’s needs. Textured surface of the upper button decreases the risk of accidential «blind» hit The chosen level of cursor speed is indicated by the color of the scroll wheel Cursor speed can be adjusted on any mouse keys. 4 DPI levels are supported and each level can be customized accurately to your needs Button durability: 5million clicks