2-Minute Automatic Smart Timer-Dentist recommend brushing each of the 4 sections of your mouth for 30 seconds timed to perfection with the 2 minutes built-in timer. Pauses every 30 seconds reminding you to change sections, so you don't end up "over-brushing". After 2 minutes you can restart the brush by simple pressing the 'on' button again.The built-in memory module remembers your last mode you used. IPX7 Waterproof-Safe to use in the bath or shower as the toothbrush is rated.More effective at removing plaque and stains from smoking, coffee etc... than manual or regular electric toothbrushes. Fast Charge-USB charging make this globally compatible, you can charge the brush anywhere in the world using a USB port / plug.Once fully charged, the automatic charging mechanism will shut down, thereby keeping energy bills low. 5 Cleaning Modes-Professional cleaning with 5 Modes,White, Clean, Sensitive, Polish, Massage,suitable for different oral conditions,help you professional teeth cleaning at Home,have a fresh, clean taste and healthier gums. Powerful Sonic Cleaning-With 40,000 micro oscillations per minute this provides you with the ultimate clean for your teeth.Your teeth will feel healthier in one week and your gums will be strong and more resilient within 2 weeks.