BESTEK Ultrasonic Tooth Cleaner Oral Irrigator, 5 Modes Adjustable, USB Rechargeable, Built-in LED Light, Portable Tooth Cleaner T8 【Five Vibration Modes】SOFT (Gentle Mode), COMF (Standard Mode), STAND (Medium Strength Mode), STRONG (Powerful Mode), SUPER (Super Powerful Mode). Please select the mode according to the actual situation. *When using for the first time, please start with a low level. 【Easy-to-Use Design】No complicated operations! Press and hold the power button for about 2 seconds to turn it ON. While the power is ON, each press of the M (Mode Setting) button cycles to the next mode. Press and hold the power button for about 2 seconds to turn it OFF. This ultrasonic tooth cleaner automatically turns off after approximately 10 minutes of continuous use. 【Safety Protection Design】The vibration automatically stops when it touches the gums. Ultrasonic vibration starts after contact with teeth or hard objects, and you will clearly feel the cleaning head working. 【Convenient to Carry】Small and lightweight, easy to carry. Perfect for home use, as well as for travel and business trips. 【IPX6 Waterproof & USB Rechargeable】The ultrasonic toothbrush body has excellent waterproof performance and can be used without problems with normal splashes. Supports USB-C charging, making charging faster and more convenient. *Do not immerse the main unit in water, and do not wash it completely with water.