4 Modes Design(Each mode has four intensity adjustments) 1.Four-gear(weak, medium, strong, stronger) cleaning mode(Clean)about 32,000 times/minute, through the soundwave toothbrush high-frequency vibration, thoroughly clean teeth, completely clean eacharea of the mouth, generally normal use of this mode. 2.Four-gear(weak, medium, strong, stronger) sens ive mode(Milder)about 35,000 times/minute, the first use of sonic toothbrushes, it is recommended to use this mode. Toothache and tooth allergies use thispattern to make teeth more comfortable. 3.Four-gear(weak, medium, strong, stronger) white mode(White) about38,000 to 45,000 times/minute, a variety of frequency mode operation,more effective to go tea stains, tobacco stains, dental plaque, this modefor people with higher needs design. 4.Four-gear(weak, medium, strong, stronger) gum health mode (Mas care) about 31,000 to 46,000 times/minute, high-frequency rhythmic shock, improve coffee stains, tobacco stains, tea stains, suitable for stubborn dental stains people to use. Note: This machine has a memory function to automatically savethe last used gear Power/Mode: 1. Press the power button, continucus press to shift among modes(press within 2s) 2. Each mode has 4 intensity adjustments(press within 2s) 3. Press the power button, press again after 3-4s use to turn off. 2 Minute Smart Timer 2 Mins Smart Timer & Along lasting Battery Life - Built-in Timer with 2 mins auto shut-off and interval pause of reminding to change brushing areas every 30s helps to give you a total mouth clean, With this brush you will improve your oral health easily. Designed with USB fast charging system. Package Includes: 1 x Electric Toothbrush 4 x Replacement toothbrush heads 1 x Charging Cable without Adapter 1 x Instruction Manual