Fill your home with the scents you love with the Crochet Ultrasonic Diffuser. The Crochet Diffuser runs up to 4-hour continuously or up to 8-hour intermittently. Customize your relaxation with the 60, 90, 120-minute timer and 7 LED lights. The 7 LED lights can rotate or be fixed to one color. To use, add water and the essential oil of your choice, turn it on, and let the cool mist refresh your day.