The teeth whitening pen effectively and quickly remove years of stains caused by 16+ reasons such as coffee, tea, wine, smoking, soda and more. The pen provides fast tooth whitening results with only 30 seconds of daily use. Your teeth will whiten about 4~8 shade lighter. It's designed to be as simple and easy to use as possible. The teeth white pen features a durable twist mechanism with a soft brush tip which can paint each tooth and its crevices more easily and gently for a complete whitening experience. Target the surface of each tooth, control the whitening serum applied and minimize irritation and tingling sensation by avoiding contact with gums and soft tissue.