Tofern Creative Patented Green Bamboo Humanized Design Eco-Friendly Dpi 1600 Pc Wired Mouse Mice Ergonomic design in line with the curve of palm to give you an optimal and comfortable grip Green bamboo material made, non-toxic, smell free, eco-friendly, sweat absorbent and anti-bacteria Just plug the USB interface into the USB port of PC without installing the driver, easy and convenient Humanized symmetrical design to meet the needs of both right-handed and left-handed person The intact bamboo fiber having strong effect of breathability and sweat absorption, making you feel warm in winter and cool in summer