ALLEN 3L Cylinder Shape Cool Mist Ultrasonic Air Humidifier Vaporizer Essential Oil Supported Quiet Touch Screen White 360 degree rotation air humidity with adjustable mist outlet Large capacity water tank: 3 L & built-in essential oil slot Detachable mist outlet, convenient to clean Touch screen & 3-color indication light showing the mist out volume Fabulous ionizer purification for fresh air & automatic power off when out of water