A4tech V-Track Gaming Laser Mouse F3, incomparable precision at your fingertip.Innovative V-Track technology utilizes vertical light which goes deep into the details of all surfaces. Guaranteed smooth and accurate tracking anywhere, enjoy the best precision during the game-play. 3000CPI, high sensitivity can shift from pixel-precise targeting (100CPI) to lightning-fast maneuvers (up to 3000CPI) in each mode. Response time 1MS.