Electric Ultrasonic Scaler for Teeth Whitening Cleaning Dental Calculus Plaque Remover Tartar Eliminator Dental Stone Removal

Type A & Type B if the item cannot work, please operate as following steps. 1.charge the item for 2-3 hours 2.press it for 3 seconds to turn on the machine. 3.press for 1.5 seconds to set the machine at soft modes. 4. touch the hard things(like teeth) to try.(in order to protect the skin, the item cannot work when it doesn't touch the hard/strong thing)