The natural vertical position of hand and wrist stimulates mouse movements from your arm preventing RSI complaints Vertical shape helps improve circulation and reduce tension The plastic used for this mouse is 100% recycled Adjustable buttons, personalise your own buttons, such as cut and paste, to work even more efficiently Lightweight for minimum muscle tension Ergonomic round shape with support for the little finger and thumb for a comfortable grip with less muscle strain Medium size for hands measuring 165 - 185mm Right Handed Wireless, includes a rechargeable accu, with an accu time of up to 50 hours Certification with EcoVadis Gold and AGR Certified Products