The Waterpik ION Professional cordless water flosser provides maximum performance with cordless convenience. Because there is no cord clutter or outlet needed during use, you can place ION wherever it fits best on your countertop. And it is exceptionally compact and stores easily. ION delivers full-size cleaning performance with 10 settings, and its rechargeable lithium-ion battery lasts up to 4 weeks per charge. It features On/Off water control on the handle, removable water reservoir with 90+ seconds of water capacity, 7 flossing tips for multiple users and a variety of dental needs, and a convenient tip storage case. The Waterpik ION Professional water flosser removes up to 99.9% of plaque bacteria that causes gingivitis, cavities, and bad breath from treated areas and is clinically proven up to 2X as effective as string floss for removing bacterial plaque and improving gum health. Waterpik is the #1 water flosser brand recommended by dental professionals, and the Waterpik ION Professional water flosser is accepted by the American Dental Association (ADA) for safety and effectiveness. Backed by a 3-year manufacturer's limited warranty, see product manual for details.