MOJO Silent Bluetooth Mouse - Wireless Optical Mouse w/Adjustable Sensitivity Bluetooth wireless connection - No USB dongle required! Compatible with Windows, Mac, Android, Linux. (Please note iPads, iPhones, and most other tablets and smartphones are not compatible with computer mice.) Number of Buttons: 6 (plus scroll wheel) silent Adjustable DPI/sensitivity button, Bluetooth pairing button, Low battery indicator, Next/Last Page (for web browsing) Powered by 2xAAA batteries (included) Bluetooth wireless connection - No USB dongle required! Compatible with Windows, Mac, Android, Linux. (Please note iPads, iPhones, and most other tablets and phones are not compatible with computer mice.) Number of Buttons: 6 (plus scroll wheel), all silent, Powered by 2xAAA batteries (included) Adjustable DPI/sensitivity button (800-1200-1600 dpi), Bluetooth pairing button, Low battery indicator, Next/Last Page (for web browsing)