The CHERRY GENTIX 4K mouse has an ultra-high resolution optical sensor making it ideal for use with high-resolution monitors. The handy DPI switch lets you switch between four preset resolutions with a single click while the two additional thumb buttons you can navigate back and forth in your browser. Other highlights: - 4-level adjustable resolution - Perfect ergonomics for both small and large hands - Pleasant feeling in the hand due to abrasion-resistant surface finish - Rubberised side panels for optimum grip Products purchased after 01/04/2019 come with an extended warranty of 3 years. System requirements: USB port