Ecooltronic 300ml Wood Grain Ultrasonic Cool Mist Humidifier, Waterless Auto Shut-Off for Spa Baby Unique Design. With classic wood grain finish, this essential oil diffuser diffuser covers up to 25-30 square meters, as a decorative piece, perfect for your room,office, yoga room, hotel room etc. Large 300 ML Capacity Tank - The larger tanks makes for better mist and means the device can be used for longer. The essential oil diffuser will release mist at a rate of 35-50 ml every hour. 4 Timer Mode - The diffuser has a built in timer mode that allows you to choose when the device automatically turns off. Select 2H, 4H or 6H or simply select ON for a continuous mist. 100% Safe : Two mist mode with auto shut-off function that automatically power off when water level is low. Ultrasonic Technology- It is whisper-quiet and diffuses aroma oil creating a relaxing and good smell environment.