<p>This flosser uses ultra-fine threaded water jet, 1600-1800 pulses per minute, water pressure 40-130 PSI, water flosser flosser uses powerful water pump and pressure regulator technology to keep the water pressure stable, avoiding bleeding gums and painful impacts. This water flosser comes with 5 replacement nozzles. The 360° rotating nozzle makes it easy to clean from any angle and helps prevent cavities, calculus, bleeding gums and tooth irritation. The water jet flosser has a built-in 1500 mAh battery that can be fully recharged in just 4 hours and lasts up to 50 days, and the included USB cable supports charging of power adapters, computers, car chargers, and mobile power. Ergonomic curved handle with non-slip granules for a comfortable grip. The flosser uses the latest water pump with ≤80db noise, so you can use it in the morning and late at night without disturbing others</p>