Ergonomic Mouse - The ergonomic design firmly supports your palm, effectively reducing mouse arm or tennis elbow pain. An ideal choice for those who use the mouse for a long time Rechargeable mouse - using 2 AAA batteries, normal use for about 1-2 months, the new generation of low functional loss technology with power switch, provides up to two months of battery life, eliminate the trouble of changing batteries frequently; charge for 3-4 hours, can be used for 1-2 months, and use polymer lithium battery as the rechargeable battery, which can be used while charging and is environmentally friendly. < /p> This vertical mouse is quiet, smooth and responsive. The forward/back buttons are a more convenient way to browse websites, and the forward and back buttons under the left thumb of the mouse can speed up navigation, allowing you to surf the web easily and browse files quickly. Ergonomic design: The shape of the mouse is designed according to the curve of the human body, reducing the