BPA Free Oil Diffuser: Essential Oil Diffuser is baby safe PP material, please note it is suitable for environments up to 50 sqm. If the environment is bigger, the aromatherapy effect will be less bad. Quiet Ultrasonic Operation: With advanced technology, the essential oil diffuser is very quiet while working. It diffuses a very fine mist, improves dry skin and diffuses a pleasant fragrance. Note: If water is added on the maximum line, there is little or no mist. Add 2-3 drops of essential oils, if you add more drops, there will be no continuous mist. Timer Mode and Leak-proof Shut-off: The essential oil diffusers have 3 modes of time setting: 60m, 120m, 180m, AUF, ON, with 250ml capacity, the humidifier can last up to 5-7 hours, the oil diffuser will automatically turn off when there is no more of water. Warm White Night Light & Low/High Fog: This essential oil diffuser has peaceful warm white light, creates a calm and soft atmosphere when you are working, reading, studying or sleeping . You can use the fog alone without a lamp. Long press the light button to turn off the light. Long press the fog button to turn off the device in any mode.