1. Deep cleaning of the teeth: The oral irrigator uses a strong water pressure of 1600 1800 times per minute to help you remove 99.99% of food residues hidden between the teeth and deep in the gums and below the normal gum line, thus improving gum health. Conventional dental floss has an effectiveness of 50%. 2. 4 modes: Power mode (deep cleaning stubborn residues), standard scrub (daily oral cleaning), gentle mode (gentle cleaning, gum care). 3. 4 nozzles: An oral irrigator is an tool for maintaining good oral hygiene. The device comes with 4 interchangeable nozzles, providing multiple cleaning options for multiple family members. From standard cleaning to gum massage, oral irrigators allow you to effectively meet your specific oral care needs. 4. 300ml and long battery life: The water flosser features a 300ml water tank, ensuring sufficient and uninterrupted water flow while saving you the hassle of frequent refills. The built in 2000mAh battery takes only 3 4 hours to fully charge and can last 40 50 days on a single charge.