FATIGUE RESISTANCE VERTICAL DESIGN - Scientific ergonomic design provide better support and more comfort for your hands and reduces the torsion of the forearm and wrist caused when using traditional mice. HIGH PRECISION PROFESSIONAL GAMING MOUSE - Switch between DPI levels 1000/1600/2400 to adjust mouse responsiveness depending on your need or preference. Optical Tracking Technology ensures greater sensitivity for precise tracking on a wide range of surfaces. MULTIFUNCTION AND RECHARGEABLE - Advanced "Page Back" and "Page Forward" functionality buttons positioned where the thumb rests increase web browsing convenience for internet surfers, gamers and people who work at length at the computer. Built-in rechargeable y. You no longer need to buy ies. WIRELESS MOUSE WITH USB DONGLE – Avoid the hassle of being tied down with a wired or cable, use the included Dongle Transceiver to connect wirelessly to your computer. The mouse is a ple plug and play device, your computer will detect it automatically after plugging into a USB port. (NOTE: THE USB RECEIVER IS STORED INTO THE SLOT IN THE BOTTOM OF THE MOUSE.) WIDE COMPATIBILITY - Compatible with Windows 8/7/10/Vista/XP/2000, Mac OS X（over V10.4), Linux (NOTE: The forward and the backward buttons are not recognized on Mac).