Beautiful Ultrasonic Cascade Diffuser (Designer Series) by Healing Solutions with a run time of 5 hours. Creates instant relaxing aromatherapy with essential oils (sold separately) and color changing LED lighting. Whisper-quiet with advanced ultrasonic technology, without any interference with your work or sleep. Increases air moisture for easier breathing and may aid in relief of coughs, colds, and flu symptoms, including nasal congestion, dry cough, sinus irritation, nose bleeds, as well as dry skin. Helps control pet and animal odors. Automatic shut off safety system when water runs out, protects the product from being ruined.