The S1 sonic electric toothbrush is equipped with a button in the shape of a concave arc. The button is highly ergonomic so that the thumb fits comfortably. The button is surrounded by an 0.8-2.11mm-high waterproof ridge that prevents water on the brush handle from entering the button opening. The wireless magnetic charging surface is designed to fit perfectly with the bottom of the brush handle. Cyclone Tech™ technology and a vibration frequency of 41000 beats/minute produce a super-powerful cleaning effect. The toothbrush uses IPX7 waterproof standards and is equipped with four cleaning modes: clean, whiten, polish, sensitive. One charge at 800mAH provides power for up to 30 days.