This wireless mouse is built-in rechargeable battery, simply charge the mouse with Type C charging cable (included), no need to change batteries. Battery indicator light shows the current battery level, and it flashes while charging or when the mouse needs charging.The magnetic design of mouse shell creates a solid attachment. Unique full transparent design brings you even more mouse hi-tech enhancements. Silent design for left and right buttons creates a quiet environment at home or office. And this ambidextrous wireless mouse is designed for comfort and extended use, suitable for both right-or left- handed use.