Built-in LED light can help seeing tartar and effective cleaning your tooth. The replaceable brush is recommended every 2 months. Cautions: 1. Please change the brush when the bristles on your toothbrush begin to wear. 2. After brushing your teeth, please dry and keep the toothbrush in the ventilated place. Patent Certificate: Taiwan Pat. No. M534533 Germany Pat. No. 202016106206 Japan Pat. No. 3208493 America and China are still under examination.
