4 Modes and High-Frequency Pulses: The electric flosser uses high-frequency pulses to deeply clean teeth and mouth, and is designed with 3 cleaning functions, namely gentle, standard and strong, each with 2 levels of water pressure, equivalent to 6modes. One special mode is Massage in the flosser, which automatically cycles water pressure from low to high to provide a comfortable cleaning experience. 360 Rotating Nozzle & Long-lasting DurabilityThe 360 rotating nozzle can easily clean the mouth in all directions and is easy to install and remove. The Grinest Rechargeable Electric Flosser features a dedicated USB port for easy charging at homeor on the go, and lasts for up to 30 days on a full charge. Safe to Use & IPX7 WaterproofThe cordless water flosser is fully washable, rinsing and soaking is effortless, and with a 7-level waterproof design, it can be used safely in the bathroom at any time. (Note: There is a rubber cover in the chargingbay for safe use.) The two-button design adds protection against accidental spraying due to improper operation by selecting a mode before turning it on. Adjustable Water PressureThe water pressure can be freely selected between 45-130PSI to meet various daily flossing needs. Compared to regular floss, battery-operated water floss picks are superior at deep cleaning your teeth and mouth, effectively massaging your gums, and cleaning braces and bridges. Professional and advanced cordless oral flossers can be used to clean teeth to suit your different rinsing habits and oral conditions. Easy to Clean & Large 320ml CapacityThe flosser's 320ml large capacity water tank does not require repeated filling, one filling is enough to clean the entire mouth. The removable water tank with two filling options makes this portable water flossermore convenient to use, and the open viewable water tank makes cleaning easier.