application: 1. Discoloration of inner teeth and outer teeth (affected by coffee, tobacco, sauces, tea, food, etc.) 2. Complex tooth discoloration (mild dental fluorosis or tetracycline plaque) 3. Ethical yellow teeth 4. Other causes of tooth discoloration 5. All those who want a brighter and whiter smile feature: Provide non-slip handles to keep the straps in place until you remove them You can talk while brushing your teeth and even drink water. The strap can be molded according to the shape of your teeth The strip comes off cleanly and easily Productinformation: Composition: peroxide or non-peroxide Function: Whitening Package Content 1 box of whitening paste