Vovotrade(TM)5500 DPI 7 Button LED Optical USB Wired Gaming Mouse Mice for Pro Gamer Tracking systems: Optical. The Max DPI: 3200DPI. Buttons: 6 buttons with scroll wheel. Ajustable DPI Switch: 5500DPI. Ergonomically designed, long-term use without fatigue. Intelligent connectivity, no need to code, plug & play. Size: 127(L) x 85(W) x 37(H)mm. Weight: about 140g.