254.1 JoystickThe primary function of the joystick is to control the speed and direction of the wheelchair. The further youpush the joystick from the center position the faster the wheelchair will move. When you release the joystickthe brakes are automatically applied.If the wheelchair is fitted with actuators, the joystick can also be used to move and select actuators, refer tosection 5.5 for more details.4.2 Buttons4.2.1 On/Off ButtonThe On/Off button applies power to the control system electronics, which in turn supply power to thewheelchair’s motors. Do not use the On/Off button to stop the wheelchair unless there is an emergency.(If you do, you may shorten the life of the wheelchair drive components).4.2.2 Horn ButtonThe Horn will sound while this button is depressed.4.2.3 Speed Decrease ButtonThis button decreases the maximum speed setting.Depending on the way the control system has been programmed a momentary screen may be displayed whenthe button is pressed.Refer to section 5 for details of the momentary screen Refer to chapter 3 - Programming for details.