Humidifier, Hard Crafts Personal Humidifier - 80 ml Portable Cool Mist Humidifier with Aroma Diffuser with LED Lights, Humidifiers for Home Office Bedroom Room, Adjustable Mist mode 1. Unique Design.: Hard Crafts Ultrasonic Aroma Essential Oil Diffuser is an ideal way to add moist, comfortable air to small bedrooms, hotel rooms, baby rooms and even workplace cubicles. Add a drop of your favorite essential oil to give your room a fresh, clean scent. 2. 80ML Water Capacity. The water tank can hold water up to 80ml, enough to run for 3-4 hours easily at the mist output 20-30ml every hour. Comes with a measuring cap so you do not have to worry about overflowing or adding too little water. 3. Ultrasonic Operation Ultrasonic atomization uses vibrations at 2.4 million times per second, making water and essential oil molecules so tiny that they are easily absorbed by our body. 4. FUNCTIONS IN 1: Nebulizer diffuser, aromatherapy humidifier, fragrance sprayer, night light. It is a cool mist humidifier in hot weather, which makes the room comfortable, cozy and fragrant. 5. Hard Crafts ultrasonic aroma humidifier auto shuts off when it runs out of water and you can run it with or without the color changing lights. Safe, no condensation build up, cost little energy but brings many long-term health benefit to home / office / bedroom / living room.