The Smile reflects the technique of office bleaching. You get immediate results with an application of around 20 minutes. Strong Complete 38% hydrogen peroxide, red or white The package contains: 2 syringes of whitening gel of 3 ml each 1 syringe of desensitizing gel of 3 ml 2 syringes of 3 ml of Light Curing “the Smile Gum Guard” liquid barrier Shade guide of tooth color and instructions for use. Our whitening gel PLUS: Gel ready for use: no need for any preliminary preparation like mixing or syringe-to-syringe mixing. Just apply the gel to the teeth Effective in around 20 minutes by 1 dental whitening session only. Rarely, the whitening session needs to be repeated No need for refrigeration! Effective on both vital and devitalized teeth Performance indication: the colored gel becomes whitish after around 20 minutes of application Low dental sensitivity thanks to a pre-built teeth desensitizing agent Immediate whitening activation: no need for any lamp!" Country of Origin: Italy