EagleTec MR5M2509 2.4GHz Wireless Optical Mouse, Switchable DPI 1000/1500/2000,5 Buttons, Nano USB Receiver (Metallic Grey Color) 2.4GHz Wireless mouse, High precision, reponsiveness, High stability Switchable DPI 1000/ 1500/ 2000 Total of 5 buttons, 2 buttons for different functions of your choice, Program download online Nano USB Receiver, USB storage area Supports Windows 10, 8, 7, Vista, XP or later operating system. Low battery indicator (**batteries not included)