Beauty, Personal Care and Cosmetic Products Design Isotopetc Electric Toothbrush by HuangTianyi Chu Wenbao Li Siyan Isotopetc is a portable electric toothbrush designed for travel and daily use. The compact body has an elliptical cross-section and weighs 212 grams. The set includes a charging base with ultraviolet disinfection, replaceable brush heads and a tongue cleaning brush. The brush head measures 15 millimetres in diameter and produces up to 36,000 strokes per minute. A rechargeable lithium-ion battery is charged through a USB connection and lasts up to 30 days. Environmentally friendly materials are used, and the curved form is easy to carry.