Large Capacity & Waterless Shut-Off: Our cool mist humidifier has a 400 ml capacity and uses state of the art wave diffusion technology to atomize essential oils for ultimate wellness.For your safety and product life, the atomizer will auto turn off when waterless. Long Time Working: This Oil Diffuser comes with 4 built-in timer setting modes: 1 / 3 / 6 Hours/ Continuity. You only need to pour in enough water and a little essential oil to enjoy the smell of nature. Inner peace,sit back and then work, study, clean, unwind, exercise, etc. Seven Soothing Light & Delicate Mist: Bedroom Scent Diffuser Vaporizers uses ultrasonic technology to make the mist more delicate. With plant essential oils, it can soothe your nervous nerves, soothe your soul, and relax. Great night light for young children who are afraid of the dark night. Wonderful Gifts for Your Lover and Friend: The Aroma Diffusers can be used as Humidifier,Air aroma machine, Night Light,Great Gift. To create a peaceful and comfortable environment for you to relax and enjoy life.The humidifier is the best gift for your sweetheart.