This rain drop humidifier simulator function creates a realistic and soothing sound of rain, perfect for helping you wind down after a long day. The unique aspect is the water drop sound feature. It produces the sound of raindrops, which can help to create a peaceful atmosphere and soothe you to sleep. If you love falling asleep to the sound of rain, this definitely helps. It also doubles as an essential oil diffuser, allowing you to enjoy the benefits of aromatherapy. Add a few drops of your favorite oil to the water to create a fragrant mist. It can help to improve the air quality in your room and promote relaxation and calmness. The mist and light functions of this aromatherapy diffuser work separately. You can turn off the light at night while sleeping. Or use this diffuser as a nightlight. It’s a wonderful companion for reading, sleeping, working or doing yoga.