Important information Safety instructions: Keep out of reach of children. Do not chew or swallow. Change the brush head every 3 months or earlier when worn out. Consult your dentist before use if you have had oral surgery, have sensitive teeth or gums or are undergoing dental treatment. Instructions [Installation]:Align the brush head with the handle of the electric toothbrush and press it until it clicks into place. [Use]: Use the brush head according to your dentist's instructions or follow the modified bass technique. [Maintenance and replacement]: Change the brush head every 3 months or when the "reminder bristles" indicate that a change is required. Legal Notice Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure or prevent any disease or health conditions.