The silent clicking design of the left and right buttons is ideal for using a wireless mouse in public settings. Whether you are in an open office, library, or on a crowded train, you can work without disturbing anyone around you. The ergonomic design allows the computer mice to fit more closely into your palm, reducing wrist fatigue caused by prolonged use and ensuring all-day comfort. Only 3.97*2.48*1.37 inches, the usb mouse is designed for small to medium sized hands to achieve optimal fit and comfort. Suitable for both left and right hand users. Portable design makes it easy to store in a bag for traveling. The laptop PC mouse has a 33ft /10m wireless use range, which reduces interference and delay for you. 3 adjustable DPI levels (1600/1200/800) to meet your different needs. No need to install any drivers, plug the USB receiver into your computer's USB port and you are ready to go! Only need 2xAAA battery (NOT included) Note: USB connector is stored inside the back compartment (o