The vertical R-Go HE Basic mouse has a rounded shape that follows the natural position of your hand. This ensures that your hand remains in a relaxed position while using the mouse. The vertical design is intended to encourage the mouse movement from the forearm, as recommended by ergonomists. This helps prevent physical complaints such as RSI. The mouse features a special thumb groove and a pinky groove, providing support for all fingers. This wireless mouse can be easily connected via Bluetooth.