Compact Design for ultimate portability 4-way scroll wheel for navigating up, down, left and right Works on virtually any surface with BlueTrack Technology Ambidextrous design is suitable for use with either hand Windows 10 / 8.1 / 8. Does not work with Windows 7 Mac OS X v10.10.3 -10.10.4 Android v.4.4.2 / 5.0 Bluetooth 4.0 / 4.1 (Bluetooth Low Energy)