Adopted noise reduction technology, ultrasonic diffuser operates quietly with no water dripping sounds, creates a restful and soothing environment for undisturbed relaxation, learning, working and sleeping. The covering area reaches up to 480 ft², which can use in a large room.Enjoy up to 20 hours Fragrance. The three-time setting for option: 1/3/6H timer. It features an ultra-modern marble grain design that perfectly matches any decorative style.