Sensor: Optical (PAW3212 energy-saving chip)Connectivity: 2.4 GHz USB Nano Receiver (and select variants offer Bluetooth support)DPI Levels: 5-levels adjustable (800 / 1200 / 1600 / 2000 / 4800)Polling Rate: Switchable between 125Hz (default) and 250HzButtons: 6 buttons (including forward and backward navigation buttons on the side)Battery: Powered by 1 x AA batteryBattery Life: Up to 18 monthsPower Saving: Smart auto-sleep mode activates after 8 minutes of inactivityDimensions: ~ 12.6 cm x 9.1 cm x 4.1 cm (~ 4.96" x 3.85" x 1.6")Weight: ~85g to 160g depending on construction and battery usedCompatibility: Windows (all versions), Linux, and Chromebook. Mac OS is supported, though side buttons are not functional on Mac.