Sonic technology brushes 35,000 strokes per minute. 3 brushing modes with LED indicator: whitening, standard, and sensitive. Charging base functions as a stand for the toothbrush and 2 brush heads. 2 minute smart timer with 30 second intervals. Although the Bluestone Rechargeable Sonic Toothbrush with 10 Toothbrush Heads boasts a powerful 35,000 strokes per minute, it features a customizable intensity to suit your mouth. Choose between whitening, standard, and sensitive modes, depending on your needs. Every 30 seconds, the toothbrush will vibrate to prompt you to focus on a different quadrant of your mouth to help ensure an even clean for your entire mouth. This toothbrush can go over three weeks between charges, and will flash an LED light when a recharge is recommended. The included recharge stand has room for holding two different toothbrush heads - for you and a partner or roommate.