Oral B Pro Electric Brush Gum Care 2 helps with extra cleaning in the hardest to reach areas. For appliances, bridges, crowns and implants. Ultra-thin bristles help gently clean teeth and gums. Protects the gums against excessive pressure. Time guidance to help brush for 2 minutes. LI-ION battery over 2 weeks of full charge brushing. It has a Smart Follow-up App to guide brushing according to the recommendation of dentists.