Brush your teeth.Dry your teeth and gums before use. Saliva dilutes the teeth whitening gel.Twist the pen until gel comes out of the brush.Paint your teeth with the Holo pen.Plug the Holo mouthpiece to your phone or any USB port.Wear the Holo mouthpiece and turn it on.The light will automatically turn off after 16 minutes.Rinse your mouth with water.Use before bedtime for 7 consecutive days. For maintenance, use once a week.Click here to see a quick tutorial with photos.