Steps for Usage:1: add water until below full 2: pull the air lever seven times 3: press on the button to clean tooth; Notice: by adjusting how many times you would pump, you could easily control the water pressure of water teeth cleaner, try to find the optimal water pressure that fits your teeth; If you feel the pressure is low, pump the air lever a few more times Oral Health: our water dental flosser can provide water flow delivery brought by high water pressure, helps you thoroughly remove food debris and stains between your teeth and below the gum line, oral irrigator can effectively prevent bad breath, tooth decay, calculus, bleeding gums and tooth sensitivity, keep your breath fresh, and improve your gums healthy Safety: the tooth cleaner is made of food grade ABS material, safe and tasteless, no electricity, no noise, no risk of leakage, healthy and safe, suitable for people over 5 years old; Consider every detail for you Detachable 75 ml Water Tank: you can disassemble the parts, the product can be cleaned separately, it is a sanitary oral product that can be applied for a long time if it is managed properly What You Get: the package includes 1 piece water dental flosser, which is the simplest and most effective way to clean dental floss; Washing teeth after meals and before sleep can maintain oral clean Package Dimensions : 8.35 x 2.24 x 2.2 inches; 3.84 ounces