[High Quality Real Ultrasonic Teeth Cleaning Kit] - Titanium alloy ultrasonic transducer. High power ultrasonic 30-40KHZ, no tooth injury. Resonance cleaning force is formed in the mouth and go deep into the teeth. Removes dental plaque and remaining tartar. [Stop Immediately When Touching Gums] - Uses intelligent technology to stop immediately when gums are touched. [Exquisite Design] - The streamline body design brings full comfort, powerful function and beautiful appearance, and the streamlined key position conforms to the human engineering design. [Built in Safety Mode] - It will automatically power off after continuous using for ten minutes, or if it overheats. [5 Speed Adjustment Modes] - Soft - Comfortable - Standard - Strong - Super Strong. Adjust strength according to personal conditions. [USB Rechargeable] - Built in 1500mAh battery. Charge with Laptop or Power Bank.