ZeleSouris 2.4GHz Wireless Vertical Laser Right Handed Vertical Mouse - Ergonomic Mouse-Wireless Optical Gaming Mouse Mice for PC Laptop Tablet Brand new hand-held mode of operation, the release of your wrist Precision reasonable functional layout, and easy to use Scientific ergonomic design, the greatest degree of stretch human meridian Three adjustable laser engine, adapted to different occasions to help the precise positioning 15.4 x 9.4 x 10.4 cm