Round brush head and gentle micro-vibrating bristles deliver smooth, oscillating motion, making it easy to achieve a complete clean Smart display provides real-time coaching for a more personalized brushing experience Built-in two-minute timer is broken into four 30-second intervals, telling you exactly how long to spend cleaning each quadrant of your mouth Pressure sensor alerts help you achieve optimal cleaning pressure by alerting you when you're brushing too hard Rechargeable battery lasts for up to 12 days on one charge Travel case makes it easy to bring your electric toothbrush on the go Connect to the accompanying app on compatible devices to access additional features Note: do not use on children under age three Replace brush head every three months or sooner, depending on wear - includes one Ultimate Clean replacement brush head; additional replacement brush heads sold separately