WIRELESS KEYBOARD AND MOUSE COMBO: It includes wireless keyboard and a precision wireless mouse so you can work comfortably without cable mess. Compatible for all types of Windows and Linux PCs or laptops. RELIABLE 2.4GHz WIRELESS CONNECTION: One plug and play USB receiver for both keyboard and mouse without installing any additional software, ensures a strong and reliable connection. Perfect Design: Ultra slim and beautifully compact design by for lenovo. Laser Mouse: Laser positioning technology,1000DPI wireless laser mouse, 2.5 times higher accaracy than ordinary photoelectricy mouse. The keyboard requires 2 AAA battery, and the mouse requires 1 AA battery. (Because of the distance, the batteries aren’t provided, thanks for understanding!)