There is spray gas at the front desk of Mo Lifeng Hotel. It smells good and feels fun. What is this?

Aromatherapy humidifier. I also like this little feature of Mo Lifeng Hotel, which is a small machine. I drop essential oil into it and add some water to make it smell good. In this way, whether in an air-conditioned room or in a dry winter, the air will be fresher and people will be happy. Not only the front desk of Mo Lifeng Hotel, but also some rooms are equipped, which can be said to be very intimate.