I purchased this on Amazon about a month ago. I used it briefly to check the water pressure, but haven't used it since. The box and instruction manual are not included. Thank you for your understanding. Oral Irrigator, Water Flosser, 99.9% Plaque Removal, 4 Nozzles, 360° Rotating Design, Tongue Cleaner, 4 Water Flow Modes, 20-150PSI Water Pressure Adjustment, 310ml Large Capacity Tank, IPX7 Waterproof, USB Rechargeable, Oral Irrigator, Compact Design, Ideal for Home and Travel, Gift (White)