A4Tech F3 V-Track Ergonomic Gaming Mouse - Wired - Black - USB - 3000 dpi - Scroll Wheel - 7 Button(s) OPTICAL VERTICAL Sensor - More accurate than Laser engine 5 MODES - 1 click to shift game macros 160K ONBOARD MEMORY - Stores custom macros 3000 DPI - 5 free-adjustable levels 1ms RESPONSE TIME - 8X more smoothly