Ecardy Electric Dental Calculus Remover - Tartar Remover for Fighting Tartar - Tartar Scraper - Tooth Stains - Teeth Polishing

Power on: ?? pressing "function button" . The device is in travel mode when you receive it . ?? unlock it , please press and hold "function button" f?? 5 seconds to turn off travel mode , and the indicator lights will flash from top to bottom . Then you ??? press "function button" and enjoy it .. Power off: 1 . From Selected Mode , press the function button to select "battery light" . Stay ?? this mode for ? seconds . Your device is now turned off . ?? 2 . Press "function button" after working at any mode over 5 seconds . Switch mode: ?? pressing "function button" to switch mode while working less than 5 seconds under one mode . For anyone looking to take better care of their teeth .