The wireless vertical mouse for maximum freedom at the PC. The ergonomic design of the CSL vertical mouse protects your wrist from unnatural strain. The arm can assume a neutral position, keeping the wrist steady. This helps prevent mouse or tennis elbow (RSI syndrome), allowing you to work comfortably even after hours. The wireless control, which can be used via Bluetooth or 2.4 GHz, also contributes to this. You can move your arm freely and independently across the table to control the mouse.