PS:Suitable for XIAOMI T100 Features: 1. Soft DuPont bristles, appropriate for sensitive teeth to apply 2. Ultrasonic electrical toothbrush can effectively remove plaque and decrease gingival necrosis. 3. Adopt DuPont American tynex traditional 0 bristles bristles,gently for your teeth. four bristle tip diameter, deep clear the space between tooth five authorized via FDA and UV sterilized. 6 sealed packing, much more secure to use. 7 replace the toothbrush heads every three months eight you've got any questions about the toothbrush model, you would possibly seek the advice of customer service. Thank you sealed packing