Alleviate repetitive stress and discomfort on the hand wrist and arm with this ergonomic vertical grip optical mouse. Oversized contoured base keeps your hand and wrist at a neutral angle while providing added comfort and control. Programmable third button enables scrolling through documents with thumb. USB wireless receiver eliminates the hassle of cables. Connector/Port/Interface: USB; Left/Right Hand Use: Right; Mouse Technology: Optical; Wired/Wireless: Wireless.