SYSTEM REQUIREMENTS Unifying USB Receiver Required : Available USB port Windows 7,8,10 or later macOS 10.13 or later Linux Sensor technology: Darkfield high precision Nominal value: 1000 dpi DPI (Minimal and maximal value): 200 to 4000 dpi (can be set in increments of 50 dpi) Battery: Up to 70 days on a single full charge 4Battery life may vary on user and computing conditions. Battery: rechargeable Li-Po (500 mAh) battery Indicator Lights (LED) 1 LED for battery status 3 LEDs for Easy-Switch on the bottom of the device Number of buttons: 7 Gesture button: Yes