Why BeriWhite Teeth Whitening Kit?4 steps to restore the natural color of teeth:1. Decomposition of tooth melanin2. Decompose tooth stains to remove cigarette stains3. Gradual brightening of teeth4. Reduces dental problems and freshens breath Easy to solve the 6 major problems of black and yellow teeth, suitable for all kinds of people:Cigarette, tea, coffee, plaque, tartar, black and yellow pigment Two different teeth whitening pen to meet all different needs: 1xBlue whitening gel pen which can desensitize teeth and prevent tooth sensitivity. 3xTransparent tooth whitening pen which features dentist-grade 35% carbamide polymer gel whitener. Convenient Wireless Design:Wireless teeth whitening LED accelerator, free your hands, relax and do what you like when whitening teeth. Enjoy this moment.How To UseStep 1: Rinse the teeth with water, and then apply our teeth whitening gel on the surface of the teeth!Step 2: Turn on the LED accelerator, adjust the position according to the teeth, and start whitening the teeth. The whole process only takes 20 minutes!Step 3: Rinse the teeth with clean water, rinse the kit, and store the kit in a delicate box after it has dried. Tips: Rinse your mouth and teeth, avoid eating or drinking staining foods within 1 hour. This tooth whitening kit cannot be used in the following situations: After dental surgery, there are sores and caries in the mouth. If you have mouth ulcers or other oral problems, it is recommended that you consult a doctor before use.