PS:Suitable for XIAOMI T100 Features: 1. Soft DuPont bristles, appropriate for sensitive teeth to apply 2. Ultrasonic electrical toothbrush can efficiently get rid of plaque and reduce gingival necrosis. 3. Adopt DuPont American tynex traditional 0 bristles bristles,gently to your teeth. 4 bristle tip diameter, deep clear the distance between tooth five approved by way of FDA and UV sterilized. 6 sealed packing, way more safe to use. 7 replace the toothbrush heads each three months eight you've any questions about the toothbrush model, you may search the recommendation of visitor service. Thank you sealed packing