Whiten your teeth while you sleep with the Colgate Optic White Pro Series LED. Featuring the powerful combination of our whitening LED teeth whitener device, the Colgate Optic White LED is an easy and effective way to whiten overnight. To use, first brush your teeth, then apply the Colgate Optic White teeth whitening gel pen. Pop in the LED whitening tray for 10 minutes before bed and our advanced whitening technology will work while you sleep! Plus, the LED teeth whitener tray is rechargeable, so you can charge it overnight. For best results, use the whitening pen and whitening tray together nightly and sleep your way to a brighter smile.