【Ergonomic Design】The vertical design provides better support for your forearm minimizing wrist pain that can come from twisting. It reduces the tension of the wrist and hand of left-handed users 【Rechargeable Wireless Mouse】Built-in rechargeable lithium battery, fast charging via data cable, no longer need to buy batteries for your mouse. This mouse is only suitable for left-handed users 【High Sensitivity】Equipped with high-sensitivity optical tracking technology, it provides precise and smooth cursor control and response, and achieves smoother tracking on various surfaces to meet all your needs. 【Easier Web Browsing】New forward and back buttons on the side of the mouse allow you to jump to the desired page with a single thumb click, increasing your productivity. (Note: Not for Mac OS) 【Wide Compatibility】Well compatible with Windows 7/8/10/XP/Vista/Linux etc. Suitable for desktops, laptops, and other devices. Works better with a mouse pad (forward and back buttons don't work on Mac OS) 【Lightweight and Portable】Dimensions: 10.5 x 7.4 x 5.4 cm / 4.13" x 2.91" x 2.13". 6 buttons including scroll wheel, net weight: 110g/3.88oz, very convenient to carry and carry CHUYI Vertical and Ergonomic Wireless Rechargeable Mouse - An ergonomic vertical mouse for the 21st century! Designed for small and middle left hands, it can effectively relieve wrist pain How to use it? 1. It is recommended to charge the mouse for 2-3 hours after receiving it before using it 2. Take out the mini receiver 3. Insert the receiver into the computer USB interface, and wait a minute, it installs automatically. You can enjoy wireless freedom rapidly. Ergonomic Design Reduce Wrist Pain This ergonomic mouse is full of vitality, and innovation, and has many health benefits. By changing the way you use your wrists and arms, you will effectively reduce pain and discomfort. Rechargeable Design Built-in 300mAh lithium battery, charge for 2-3 hours, use for more than 30 days. (Battery life may vary by user and computing conditions) Add 2 Buttons on the Side Forward/Back buttons help you browse the web faster to increase your productivity (Note: Not available in MAC OS systems) Product Specifications: Charging Port: DC port Battery Capacity: 300mAh Sleep Mode: 10 minutes Wake-up Method: Move the mouse or click the button once Button: 5 buttons in default Product Dimension: 10.5 x 7.5 x 6 cm / 4.13" x 2.95" x 2.36" Wide Compatibility: Device Compatibility: PC, Laptop, Computer, Macbook, Desktop System Compatibility: Windows 10, Windows Vista, Linux, Mac OS X, Windows XP Package List: 1 x Wireless Vertical Mouse 1 x USB Receiver 1 x DC Charging Cable Warm Tips: Due to the innovative design of this ergonomic mouse, it may be difficult to use at first. Please use it for several days to get used to the design and enjoy full comfort