Ergonomic design with built-in thumb scoop keeps your hand & wrist at the perfect height & angle to reduce pressure on joints. Customizable Windows touch tab along with six additional task-specific buttons help you work quickly & efficiently. BlueTrack technology enables effective tracking on nearly any surface, even carpet. Four-way scroll wheel allows you to navigate horizontally or vertically. Connector / Port / Interface: USB; Left / Right Hand Use: Right; Mouse Technology: Optical; Wired / Wireless: Wireless.