Bio dental floss 400 ml one charge is enough for 70 days * Type-C charging provides convenient charging with a USB-C cable that uses the same connection as most mobile phones, and a one-time charge is enough for 70 years of use   Days. * Large 400ml water tank allows use without having to re-touch it halfway. * Provides 5 adjustable adjustment settings for different compression preferences and character enhancement needs.         Five adjustable cleaning tools         Intense: for cleaning for deep teeth         Normal: Suitable for updating         Medium: Effective cleaning A