Panasonic Oral Irrigator Jet Washer Doltz Ultrasonic Water Flow Waterproof Cordless White EW-DJ55-W Promotes gum health in about 3 days with "ultrasonic water flow" (*Water flow that generates ultrasonic waves through the shock waves when bubbles burst*) (*Only when using the ultrasonic nozzle*) (*Verified at water pressure level 10. According to our research. Usage effects vary depending on conditions.*) [Type] Handheld / Cordless / Waterproof / Ultrasonic Water Flow [Water Flow] Ultrasonic Water Flow [Tank Capacity] Approximately 200mL [Continuous Usage Time per Water Refill] Approximately 1 minute (Water pressure level set to maximum & ultrasonic water flow nozzle) I tried several types of oral irrigators to choose one that suits me, such as water flow, water pressure, and operating noise. I filled it with water and tried the 5-level water pressure settings with the ultrasonic water flow nozzle for about 1 minute. I did not use the ultrasonic water flow nozzle to clean my mouth, but I have taken it out of its plastic packaging, so I will exclude this nozzle from what I will sell. (The box, instruction manual, and other accessories are included) Please consider purchasing only if you understand that this is a product that has been tested as described above. Please refrain from purchasing if you are overly concerned about cleanliness. #PanasonicEW_DJ55_WWHITE #Panasonic #Panasonic