・ Ya-man Jet Floss Compact (Model Number: YOI-100W) This oral irrigator uses the power of water to wash away debris from between teeth and periodontal pockets. It removes plaque with a powerful "tornado water flow." It is IPX7 waterproof and can be washed completely. The body size is approximately W48 x D57 x H125 (mm), and it weighs about 200g, making it a compact design that is convenient to carry. It is USB rechargeable, and an AC adapter is not included. ・ Ya-man Jet Floss Nozzle UV Sterilizing Case (YOI-UV01W) This is a nozzle case specifically for the Jet Floss, and it has a UV sterilization function. It keeps the nozzles clean, allowing for safe use. A 5V1A AC adapter (sold separately) is required for charging. There are two main units, and one of them has been opened and tested with water to confirm operation. Oral irrigation has not been performed. There are also two sterilizing cases. Please feel free to comment if you have any questions (^^)