iCrown (TM) 2.4G RF Ultrathin Wireless USB Mouse for PC, Mac(not compatible with Retina Macbook Pro ) DELL, ASUS, SAMSUNG, ACER, SONY, HP, IBM, Lenovo, TOSHIBA, laptop, Chromebook, Purple 100% brand new For all laptop ,Macbook Air and desktop with USB 2.0 (Plug and Play) No battery provided (USE AA alkaline battery); USB plug inside battery slot Attention: The USB receiver store beneath the battery cover 2.4GHz digital wireless transmission, operation distance is up to 10 meters