Precision optical performance in an agile, modern design with USB micro receiver ; 5 buttons with scroll wheel ; 2.4GHz RF technology offers wireless freedom with effective range up to 33ft; Auto power management helps maintain proper battery levels; On-board storage compartment protects USB receiver from loss & damage; Top-mount push-button control instantly shifts resolution from 800, 1200 & 1600dpi; Ergonomic shape & no-slip texture provide secure grip; Low-friction base smoothly glides over work surfaces; Plug & play installation; Windows(R) & Mac(R) compatible; 3-year warranty; Gray/Black;