Soft premium DuPont Tynex bristles. Effectively cleans, gentle on tender gums. The bathroom battle is over! Children love brushing with B-BRITE toothbrushes because they're fun - parents love them because they get their kids to brush. They promote good oral hygiene by encouraging children to brush regularly, and for the correct time. Flashes for 2 minutes, as recommended by dentists. The handle was designed to fit little hands. Push the button to activate the toothbrush, it will automatically turn off after 2 minutes. Batteries are included, these are non replaceable. Batteries will last for the life-time of a toothbrush, approx. 3 months. All B-Brite toothbrushes come with soft, premium DuPont bristles. Easy-to-hold handle for little hands. Small brush head for tiny mouths.