Tong Shi ultrasonic teeth cleaning machine visual dental scaler tooth calculus remover cleaning tooth stain remover visual cleaner for teeth to remove smoke stains and tea stains Intelligent, visual, and sterilizing Whiten teeth without damaging them Tong Shi intelligent visual sterilizing ultrasonic teeth cleaning machine High-definition mobile app display Percision cleaning between teeth 500W professional endoscope Visualization - cleaner teeth Charging and cleaning base Charging/sterilizing/storage all in one machine Sterilizing: automatic sterilization for 5 minutes Storage box: open the base to store the working head Charging: open the USB plug and connect the data cable to charge and sterilize at the same time Real ultrasonic transducer Visible teeth cleaning effect 200 million times/minute ultrasonic vibration frequency 42KHz sound wave frequency 316F stainless steel teeth cleaning needle Sharp teeth cleaning needle: clean teeth gaps and small tooth calculus Wide teeth cleaning needle: clean teeth surface and large pieces of tooth calculus Three teeth cleaning modes for different needs Gentle mode for sensitive/elderly use, gently removing dental plaque and stains Enhanced mode to remove stubborn dental plaque such as smoke stains, coffee stains and tea stains Powerful mode to remove formed tooth calculus and deeply clean teeth Overheat automatic power-off protection