From the manufacturer, this Lenovo Professional Ultraslim Wireless Combo Keyboard & Mouse Combo comes with two AAA batteries for the mouse and an Arabic/English layout. Experts complete tasks in a timely and elegant manner. Like the professionals who use them, the Lenovo Professional Ultraslim Wireless Combo was designed to be as dependable and stylish. Its 2.5 zone rechargeable keychain is 12 mm thick.