The ErgoClick USB Palm Switch, in combination with the SmartNAV hands free mouse, allows you to have complete computer control without the need to ever lift a finger. Use your left palm to click, while using the SmartNAV for cursor control - its that simple. The ErgoClick uses your left palm to perform left, right and double mouse click actions. Slight movements of your palm in different areas will generate the clicks - no strain at all! The ErgoClick also has a unique feature which is not available in any other keyboard or traditional mouse currently on the market : an adjustable clicking force. Get relief from the pain of repetitive strain today with the SmartNAV and ErgoClick!