The UT415 features advanced blue ray tracking technology with up to 1700DPI resolution , with an instant switch that lets users choose between sensitivity levels of 900, 1400, and 1700DPI. Excellent performance leads every move specifically and smoothly on the surface even white A4 paper. Two combo hot keys bring up Windows 8 charms or switches tasks in other Windows OS versions to make things that much simpler; With a pearlescent color coating and ergonomic design, the UT415 keeps you comfortably in control of any task.