Quiet ultrasonic operation will not disturb your sleep or relaxtion. Auto shut off when water runs out. 7 color light, adjustable between bright and dim. Humidify your living space to prevent dry, stuffy air and flu and cold germs infecting your loved ones. Prevent dry and chapped skin in dry winter months. Portable for home, yoga, office, spa, bedroom, baby room. Perfect gifts for family and friends who love aromatherapy or can benefit from aromatherapy healing. Water shortage protection design to ensure safety. The diffuser will turn off automatically when the water is not enough. This essential oil diffuser is perfect for every home, office or yoga studio so you can create a calming atmosphere. This device will purify and humidify the air so you will no longer suffer from dry skin and lips. The diffuser will create the perfect environment so you can breathe and sleep better, relax, and feel better than ever!