Characteristics: 1. You can renew the air by the aroma diffuse by the ultrasonic humidifier. 2. you can add 3-5 drops of etheric oil in the water, to refresh your mind when you have a long office meeting or study only by the subtle aroma diffuser by the air humidifier. 3. Relax your body and mind after a busy day. Feel relaxed and comfortable by the delicate scent around the bedroom. Four. enjoy clean space and soul when doing yoga or simple stretching exercise together with beautiful aroma