A4 XL-750F 3XFire Laser Gaming Mouse, 2500dpi, USB 3xFire Button - Rapidly Fires 3 Shots with just 1 Click-Increasing Target Accuracy. Advanced Smart-X7 Software-Performs a Complete Keyboard Simulation Interface for Players to Create The Fire Button Bullet Channel almost in Line, the Hit Point Focus Overall. Intelligent 4th and 5th Buttons-Forward and Backward. Package Contents: A4Tech X-750F Mouse, SMART-X7 CD Driver, and USB or PS2 mouse port