IPX7 Waterproof & Auto-timer - Both internal and external are IPX7 waterproof to provide dual protection. The braces cleaner automatically shuts off after 1 minute of work to protect your gum. You can use it without any safety concerns. Type-C Charging & Long-lasting Battery - The dental water flosser with advanced type C charging port, one full charge delivers 30 days of continuous use.It is definitely a good companion during your trip. Mini & Portable Design - This mini flosser has a portable and compact body (10.2cm*6.5cm*3.5cm), making it very easy to carry and use. Take it with you and don't worry about taking up space or being too heavy, get a deep teeth cleaning easily and make your smile confident all the time. Powerful Cleansing - This oral irrigator adopt 1600t/m high frequency water pulse and 0.6mm jet water, the flosser can remove up to 99.9% of plaque from treated areas for improving gum health. Replaceable Dual Water Tanks - This mini water flosser has 2 detachable water tanks (50ML and 100ML) to meet your different needs. whether you use it at home, a trip, or date, this flosser will easily fit into your lifestyle.