Eliflosss cordless water dental flosser is IPX7 waterproof. Detachable tank makes refilling water much easier. Our water dental flosser provides the 360 rotatable nozzle, which allows you to use it from any angle, more importantly help you reach area that have difficulties to access. It also helps prevent the tooth decay, dental plaque, dental calculus, bleeding gums and dental hypersensitivity. Its the perfect water dental flossers for cleaning teeth. It includes a powerful 2500Mah lithium battery and can provide continuous using up to 3 weeks after 6 hrs fully charged. There are also 7 replaceable tips, each tip applies for different needs.