hope this helps.
i just received this so i can't say how long it last .you need to charge it first with the included charger .then pop of the cap and fill the little plastic piece up with distilled water .don't over fill it or it will leak .then put the cap back on and make sure it's on tight .next slide the little piece where the crystal is down .it should start to mist .i love it so much .fun product and feels like the spa. hope this helps.
Rating: 5 stars