Compact Design, Travel Friendly - With the dimension of 4.09*2.68*1.49 in, this compact mouse provides more portability and a better travel experience. Only compatible with USB-A Port Devices. | Ergonomic Design, Comfort Grip - The contoured shape of this mouse is ergonomically designed to fit the natural curve of your hand, ensuring lasting comfort and productivity. Featuring rubber side-grips, it offers added thumb support for a superior working experience. | Advanced Optical Tracking - Featuring 5-level adjustable DPI (800/1200/1600/2000/2600), this mouse provides high-performance precision and smart cursor control on most surfaces. ( Glass surface is Not included ) | 24 Months Battery Life - Combined with a power-saving mode and on/off switch, this efficiently engineered mouse grants you up to 24 months of battery life. | Plug and Play - Simply plug the USB-A mini-receiver into your Windows, Mac, Chrome OS, or Linux computer and enjoy seamless connectivity up to 49 feet. | Dedicated Customer Support - If you encounter any problems while using the product, please feel free to contact our professional customer service team and enjoy the TECKNET 36-month warranty. | Notice - Please be aware that the AAA batteries are not included. The USB receiver is stored at the back of the mouse.