SPECIFICATION: TRACKING Sensor: PMW3327 Gaming Engine Resolution: 100~6,200 CPI Frame Speed: 8000 fps Acceleration: 30 g Tracking Speed: 220 ips RESPONSE Report Rate: 125~2000 Hz Key Response: 1 ms DURABILITY Button Lifetime: Over 20 Million Clicks ( Left / Right Button ) Wheel: Over 500,000 Scrolls GENERAL Product Dimension : 68 x 126 x 43 mm Box Dimension : 192 x 140 x 50 mm Weight : 500gram