High Quality NEW!!! Dimensions: 103.5 x 70.5 x 38.6 mm Colour: White Number of buttons: 6 Power Source: 1*PCS AA Battery(Not included) Average battery life: 15 months DPI: 800-1200-1600-2000-2400 Package includes: 1 X mouse & 1 X USB receiver Energy-saving - If mouse is inactive for over 8 mins, it will turn to power saving mode 2.4 G Wireless Transmission Technology - Fast data transmission Compact Receiver - Wireless tiny receiver can be inserted into the slot next to the battery slot, allowing ease of storage when not used Wide Compatibility - Compatible with most system including Windows, Mac & Linux Comfortable Hand Feeling - Special processing & advanced material NOTE: Apple computers (Mac OS) doesn’t support the mouse’s customized (programmable) function. The mouse’s normal function still can be used with Apple computers or Mac OS.