Teeth whitening kit contains teeth whitening light and teeth whitening pen. GlorySmile smart teeth whitening mouth tray led light adopts special cold light technology, combined with mouthpiece and high intensity cold light. Blue ray reacts with the professional teeth whitening gel, which can effectively remove the stains on the tooth surface. The soft mouthpiece is designed based on the principles of human oral engineering. You will feel more comfortable in the course of teeth whitening process. When you bite the mouthpiece, it will completely fit and cover your teeth. Before starting your treatment, it is very important that you know how it works and what needs to be prepared. Please read through these instruction carefully before starting your treatment!