Voxx Rechargeable Ergonomic Wireless Mouse Wireless rechargeable mouse with digital display and ergonomic vertical design for optimal comfort - Ergonomic vertical design reduces arm and wrist strain - LED display shows battery and connection status, wireless mode and DPI setting - Optimise your workflow by reassigning button functions via the LED display menu - Can be used via USB or Bluetooth on your PC, laptop, tablet or smartphone - Environment-friendly, no need for batteries due to built-in rechargeable battery - 9 Buttons, including easily accessible thumb operated side buttons (forward and back) and top buttons with extra grip - Perfect cursor control with adjustable speed (1200-1600-2000-2400 DPI) - Energy saving on/off switch - Functionality programmable buttons may vary between OS