FUNCTIONTeeth whitening kit, specially formulated with dark pigment adsorption technology.HOW TO USE-Gently brush your teeth before each application.- Wash and dry your hands.-Remove the pre-filled tray from the sealed sachet and immediately place it in your mouth, making sure the gel is in contact with the surface of the teeth. Activate the gel by pushing the tray towards your teeth. Activate the gel by pushing the tray towards your teeth. Both upper and lower teeth can be whitened at the same time.-Gently place your lips over the tray, carefully closing your mouth.-Remove the tray after 20 minutes and discard it immediately. Gently rinse any remaining gel on your teeth and gums with water.PRECAUTIONS AND WARNINGSKeep in a cool, dry place at a temperature between 2ºC and 25ºC