Oclean Z1 Sonic Electric Toothbrush IPX7 Waterproof Ultrasonic Automatic Fast Charging Sonic Toothbrush alduts 1.Magnetic brushless motor:low noise and long service life. 2.Blind zone detection:Built-in 6-axis gyroscope can identify 8 areas of your oral and detect blind zones. 3.Modes:whitening,cleaning,massage,sensitive+14 default customization schemes. 4.Automatically shuts off when two minutes is up with the smart timer.The interval pauses reminding you to change brushing area every 30 seconds.So that you will never miss cleaning a single spot.