The ORAL-B Pro 3 3900 electric toothbrush removes stains from teeth from the very first use. It removes 100% more plaque and ensures 100% healthier gums in 30 days compared to a regular manual toothbrush. Its round head fully brushes each tooth, easily cleaning even the difficult areas that traditional toothbrushes, such as sonic or manual ones, do not reach. It cleans interdental spaces up to 2 times better than manual toothbrushes.