Attribute Value Easy to use: Simply twist the tube bottom by counterclockwise to open and fill in water, one-key to clean your teeth and gum. Effective to Clean: Easily remove debris and food residue from between teeth and below the gum line, deep clean where regular flossing can't reach. Portable to carry: Pocket size can replace toothbrush and save your space. Cordless and Manual: Cordless water flosser without battery, anywhere and anytime you want. Perfect Dental Gift: Comfortable beauty SPA result at home or travel. Best gift for friends and family.