Features:Condition: 100% Brand New and High Quality Whitening USB charging Home Led Blue Light Tooth Whitener Using 16 high strength between 480-495nm wavelength of blue light it can whiten the upper and lower teeth at the same time Easy to carry and useMaterials:PET Light Color:Blue Package Includes: 1* usb blue light Tooth Whitening instrument Using the step: 1. Wash and dry the teeth surface water with teeth wipes2. Clean the blue teeth whitening light with warm water, and dry it with tissues3. Connect convertor with blue teeth whitening light with power supplier(Smart phone, power bank, computer, Charger with USB connect),with blue light.4. Daub teeth whitening gel evenly on the blue light surface, thickness around 1mm5. Put the blue light into mouth , bit it lightly to make the whitening gel close to teeth.6.Take out blue light and rinse mouth after 30 minutes ' whitening. If teeth no any anaphylactic reaction can do one more time to improve the whitening effect. Important Tips: 1. Regularly use whitening strips every three months to obtain a whiter, brighter smile.2. To reach and sustain a better teeth whitening effect try to reduce or avoid products such as smoking, drinking coffee, tea, colas or red wine, and eating highly pigmented foods such as cherries and blueberries etc.3. Please complete the course of all the strips within a two week period.