Sejoy Portable Cordless Water Flosser can offer high pressure water pulse 1400-1800 times/min . 30-120PSI strong water pressure to remove 99.99% food residue hidden deep . massage the gum effectively and promoting blood circulation. Also helpful for bleeding gums . bad breath . beneficial for brace and bridge care.The powerful 1800mAh battery of this portable water dental flosser can be fully charged in 5 hours via USB cable and can be used continuously for 30 days . which is compatible with any charger or equipment with a USB port.It provides 5 Mode to deeply clean between the teeth and below the gum line . removing harmful bacteria and debris that cannot be reached by traditional brushing and flossing. With the 300ML water tank . it is enough for your whole mouth cleaning.