New in Box (contents only taken out of box for inspection-reservoir has never been filled) Hydro Floss brand magnetic dental irrigator. Most effective home treatment of its kind. Cleans under gum line and between teeth to remove plaque and food debris. Great for cleaning braces. Uses magnetics to affect the water to inhibit the bacteria from adhering to teeth. 64% more effective than non-magnetic oral devices. A pulsating stream of 1,200 pulses per minute to disrupt plaque biofilm and flushes food and bacteria. Maximum pressure of 60 psi Four color coded jet tips included for entire family to use. 27 oz reservoir Adjustable pressure for comfort. Water stop button on the handle. Instructions included Purchased at dental office.