The design:wireless mouse is very small. It fits easily into a laptop bag and is perfect for travel. Two modes: BT5.1 + 2.4G , you can use the mouse on two computers, one using a Bluetooth connection and the other using USB interface to make your life easier. Quiet Design:The two buttons are specially designed to be quiet when clicked. To avoid disturbing others, you can focus on libraries, offices, living rooms, cafeterias and other public places. Working distance:10 meters working distance, 3 DPI levels adjustable (800-1200-1600 DPI) let you control the mouse speed freely Rechargeable Design: Our rechargeable mouse has a built-in rechargeable battery that can be charged via USB cable. Its superior auto dormancy technology helps ensure long battery life.