... technology,Scroll easily in any direction,Comfortable in using,Superior optical sensor,10m wireless receiving distanceFeatures:1. Cute solar wireless ... warranty6. Comfortable contoured shape for ambidextrous use7. High-definition optical sensor (1200 DPI) for responsive control8. 2.4G wireless ... selling now, and new models is coming every month. our defect rate is very low, less than 0.1%. beside, ...