Four-speed DPI can be arbitrarily selected by the driver 200-400-600-800-1000-1200-1600-2000-2400-3200-4000-4800 DPI, 7 Customized Marco Keys, 704E Game Chip, Powerful fire button function to improve game clearance efficiency,feel comfortable., Engonomic exterior design,reducing hand fatigue,comfortable non-slip roller,unique.