ultrasonic vibration can effectively remove the dental tartar, calculus, plaque, tea, and smoke stains, whisper-quiet without disturbing others, mild and painless to avoid damaging your teeth. the medical-grade 304 stainless steel tips, no rust, and corrosion-resistant for a long time safe use, easy to operate for the hard-to-reach areas with easy grips. three adjustable gear levels allow for the quick switch by one-button control, suit different teeth types, and meet multiple applications. ergonomic streamline body delivers comfortable and secure grips, user-friendly to hold for long time use. eco-friendly and lightweight material for carrying convenience, interchangeable heads for easy cleaning, hygiene, and maintenance- suitable for both home and travel use..syi