Oral-B ProfessionalCare 7800 DLX Cleaning System Improve the health of your gums by reversing the effects of gingivitis. A fully charged handle lasts 12 days between charges. Choice of two speeds for optimal control. Built-in Pressure Sensor stops pulsations to signal if you are brushing too hard. 2-minute Professional Timer signals every 30-seconds, to ensure thorough brushing in all areas. Oral-B Power Tip brushhead cleans between teeth and around bridges, crowns, and implants.