Beauty, Personal Care and Cosmetic Products Design Dr.Bei e3 Electric Toothbrush by DR.BEI Dr.Bei E3 is an electric toothbrush designed to support correct brushing. The handle is produced with IMR technology and carries a color-changing temperature film. The handle changes color when the water is between 30 and 36 degrees Celsius, a range that suits sensitive teeth and gives a more comfortable experience. The 45-degree diamond-shaped handle helps the user find the brushing angle used in the Bass Method, which removes dental plaque from teeth and gums. A gradual strength motor makes the start of each use gentle.