?Warranty?The Frohsun dental flosser has 24 months warranty. Please feel free to contact our customer service if have any questions. Contact Details: Please do not hesitate to contact us from "Account service" ? "Order history" ? "Select this product" ? "Ask product question" in the account service. We are always here standby for you. ?Travel Friendly? Frohsun Water Flosser has a compact, cordless and fashionable design for easy everyday use and is convenient to take with you when travelling. ?Multiple modes? With 5 pressure modes of Child, Pulse, Soft, Normal and Strong, you can adjust it to find a setting that suits your gums. The powerful lithium battery can be used continuously for 25 days once fully charged in just 3 hours. The IPX7 waterproof and can be used in the shower. ?Telescopic water tank?The upgraded telescopic water tank design has vastly reduces the volume of the product, and the extra portable storage bag, greatly increg the convenience of carrying. It has an exclusive internal leak-proof and drainage device, which gurantees a longer service life than similar products. ?Guard Your Teeth?Improve your oral care routine and get a cleaner mouth. Enjoy deep clean between teeth and along the gumline with Frohsun cordless water flosser; It's more effective than string floss.