Smart Oral Irrigator: More efficient interdental cleaning, achieving powerful cleaning with gentle washing. This is an unopened, unused gift. The following is from the Amazon product page: [Recommended by Dentists] Oclean W1 Water Flosser Oral Irrigator, Jet Water Flow, Patented Cyclone Air Pump, 3 Modes, App Compatible, Gentle on Teeth Brand: Oclean Power Source: Battery-powered, Lightweight [Removes dirt thoroughly with W-jet of water and air] Adopts innovative flossing technology that utilizes the power of air. By mixing compressed air with water, continuous high-pressure water flow removes dirt while avoiding damage to the gums. [Gentle on teeth and gums] Unlike conventional water flossers, the W1 cleans gently with a spray-like jet of air. The cleaning power is increased by 33% due to the force of compressed air, penetrating the gaps between teeth and removing food debris and plaque hidden deep inside. [Convenient to carry] Lightweight and compact because it requires less water than conventional water flossers. Can be used approximately 160 times with one refill, and you can floss the gaps between each tooth an average of 5 times. [Fine customization] Three flossing modes with the button on the main unit: manual cleaning, automatic cleaning, and automatic cleaning (app customization), allowing you to use your preferred settings. Furthermore, the app allows for 7 levels of strength adjustment. [Long-lasting battery that can be used for up to 30 days] Can be used for up to 30 days with a 3-hour quick charge. It can be charged anywhere by using a USB charger (sold separately), making it ideal for travel.