... optical tracing engine 2,Super-acceleration of the game 3,DPI switching technology Professinal game optical engines, accurate positioning on any ... engine High-performance gaming grade laser sensor, which is 3200 DPI high precision optical tracing engine and 2.5 times higher ... speed, 30G / s acceleration, USB full-speed transfer mode Instant DPI switching technology (support 800-1600-2400-3200DPI) High ...