NEVER USED * COOL MIST HUMIDIFIER: Uses the power of ultrasonic vibration to turn water into a cool hydrating mist that runs for up to 12 hours. Mist adjuster goes from gentle mist to tropical rainforest with a twist of the knob. * DIFFUSER: Add Breath Frida Vapor Drops or any aromatherapy-grade essential oil for easier breathing - it covers up to 320 square feet with a 0.5 gallon tank. * COLOR CHANGING NIGHTLIGHT: Equipped with a range of nightlight colors for even more control over the dreamy ambiance. * AUTO-STOP FEATURE: Designed to automatically turn off when the water runs out or the tank is removed. * 3-IN-1: Use humidifier, diffuser and nightlight all together, or individually.