Easy to use: Simply turn the bottom of the tube counterclockwise to open and fill with water, with one key to clean the teeth and gums. Effective cleaning: Easily remove dirt and food residue from between teeth and below the gum line, and clean deeply where regular flossing cannot be used. Portable to carry: pocket size can replace toothbrush and save your space. Wireless & Manual: Wireless water flosser without battery, anywhere, anytime you want. PERFECT DENTAL GIFT: A comfortable cosmetic spa result at home or travel. Best gift for friends and family.