Wireless Semi-Compact USB Ergonomic Mouse - Monoprice®This Ergonomic Mouse features a semi-vertical, ergonomic shape designed to be used with a light, natural grip. The soft-touch coating provides a comfortable tactile surface, while the ribbed rubber wheel has discernable, but quiet detents for improved control. Additional thumb buttons are available for easy backwards and forwards navigation, but are out of the way if not needed. The optical sensor provides smooth and accurate tracking on non-reflective surfaces, with adjustable DPI settings for on-the-fly switching between faster or more precise cursor control. Setup is simple - just install a AA battery (not included), plug the USB receiver into an available USB port, and turn the mouse switch on. No special drivers or configuration is required.