The ASL 553 Mouse Emulator is adjustable in a 3, 4, or 5 switch configuration. In the three switch configuration, full mouse emulation is achieved with only three switch inputs. For instance the right direction can move the mouse cursor right and left across the screen. The left direction can move the mouse up and down the screen. The forward direction can control left click, double click and drag functions. In a four switch configuration the right direction will move the cursor in a right direction across the screen, the left direction will move the cursor left across the screen and the forward direction will move the cursor up and down. Left click, double click and drag is achieved with a dedicated switch. The five switch setting allows the power wheelchair joystick to become a joystick operated mouse operating in all directions. This setting also requires a dedicated switch for left click, double click and drag.