Specification Project Type Vertical healthy mouseProduct Name 2 4G wireless mouseBrand HXSJ Wireless Technology 2 4G Wireless distance 10m Rated voltage current 1 2V 20mA Power supply 2 AAA batteries not included Number of keys 6 keys 4 buttons and 1 wheel middle button and dpi adjustable Optical resolution 800dpi 1600dpi 2400dpi Color Classification Black Gray Work Photoelectricity Button click life 8 Million times Material ABS Product weight 87gItem size 12 5 6 5 7 5cm Packing weight 125gPacking size 15 5 8 5 8 4cm System requirements Windows 98 Me 2000 XP Vista Win 7 Win8 10 Vista for Mac OS or latest Features 1 Ergonomically designed for maximum comfort to reduce carpal tunnel syndrome 2 Features with 6 keys L R mouse buttons 2 thumb buttons and a scroll wheel which is also clickable along with a dpi button 3 Comes with adjustable dpi for precision control utilizing optical laser technology 4 This is a vertical healthy mouse ensuring a comfortable hand position of your choice 5 Offers easy plug and play feature with wide compatibility ranging from Windows to Mac OS Package Include 1x Mouse1x USB Receiver1x English User Manual