What do the lights on my QuadJoy mean?
The lights or LED’s on the QuadJoy tell the user if the QuadJoy is functioning. The green and red LED’s are for Factory Programming Purposes, and should light up only when the QuadJoy is first plugged in to let the user know it is functioning correctly. The yellow LED is the zero pressure LED. The yellow light indicates that the QuadJoy is plugged in and functioning; it remains illuminated when the user is not sipping or puffing. Whenever a user sips or puffs the light turns off.