Céra Essential Oil Diffuser: Ultrasonic Diffuser of the latest generation With its elegant and clean Nordic line, it is aesthetic yet discreet and suitable for any room Selection of diffusion-independent ambient light: Intensive - Soft - Respi Zen (progressive) - Sleep: 30 minutes runs and stops. Duration: 1 h / 3 h / 7 h or continuous operation. Stays on for 30 seconds and 30 seconds off International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.