INSMART Portable Cordless Water Flosser, equipped with 2000Amh powerful rechargeable lithium battery, 300ML large water tank. It provides a unique combination of water pressure and pulsation to deeply clean between the teeth and below the gum line, removing harmful bacteria and debris that cannot be reached by traditional brushing and flossing. INSMART is manufactured under strict quality standards to provide the best experience for our customers. It is the best gift for friends, birthday gifts, etc.