Zalman 4K DPI USB Gaming Mouse Bilateral Design for Both Hands (ZM-M600R) Sleek bilateral design for both Left and Right Hander / Tracking mode: Best gaming optical sensor +32bit engine processing / Key: 3 buttons + wheel / Switch: 20 million OMRON switch Resolution: 600, 1000, 1600, 4000 DPI (16 different DIP controls via custom firmware) / Rolling rate: 125, 500, 1000Hz / Scan rate Acceleration: 6469 FPS & 20G / Interface: USB Cable Length: 1.8M / Size Weight: 63(W)x115(L)x38(H) & 90g (w/o cable) 32bit Engine Processing Type: Angle-Snap 4 steps DPI + 4 step Polling rate / Angel-Snap 16 step DPI / Angel-Snap LOD support / Free-Move 4 steps DPI + 4 Polling rate / Free-move 16 steps DPI / Free-Move LOD Support Auto polling rate using Engine Processing supports the best performance in any environment. Polling rate (Auto~1000Hz) Different DPI set according to Game Genre. 600~4000 DPI - 4 steps instant DPI switching via bottom controller. The World's No. 1 click reaction !!!