PS:Suitable for Oclean X/ X PRO/ Z1/ F1/ One/ Air 2 /SE Features: 1. Soft DuPont bristles, compatible for sensitive tooth to use 2. Ultrasonic electrical toothbrush can effectively get rid of plaque and reduce gingival necrosis. 3. Adopt DuPont American tynex usual zero bristles bristles,gently on your teeth. four bristle tip diameter, deep clean the space between teeth 5 accepted by way of technique of FDA and UV sterilized. 6 sealed packing, far more secure to use. 7 update the toothbrush heads each 3 months eight you've got any questions about the toothbrush model, you might seek the advice of customer service. Thank you. Indenpently sealed packing