"The White Royale Premium Perfection+ Kit is the crown jewel within the White Royale assortment. It contains 3 whitening pens with 9% Hydrogen Peroxide Superior whitening gel and a Smart LED Mouthpiece. The kit is very user friendly. Simply twist the bottom of the pen until a small drop of HPS whitening gel appears on the bristles and apply the gel directly onto the teeth. Then put the Smart LED Mouthpiece in your mouth and select the prefered LED mode to boost the 9% HPS whitening gel. This kit contains enough whitening gel for a complete whitening treatment. Due to the revolutionary HPS gel in the pens, the kit does not need to be stored refrigerated."