Hivel Portable USB Essential Oil Aroma Diffuser Mini Ultrasonic Mute Cool Mist Air Purifier Humidifier Skin Moisturizing 250ml - Colorful Gradient Light Reduce Stress & Relax: Stress at work takes a toll on productivity and your physical and emotional health. USB essential oil diffuser has an access to your office, computer, laptop, power bank, car. It helps to deliver therapeutic aromatherapy while clearing the air and creating a pleasantly fragrant environment to relax your mind and body by using your favorite fragrance without any heating elements for ultimate safety. Multi-functions & Safety: Advanced ultrasonic diffusing technology with auto shut off safely when liquid runs out, to protect it from damage of overheating. Mini Cool Mist Aroma Humidifier: Can be used as a mini ultrasonic humidifier. Vaporizes the liquid by ultrasonic technology, produces cool and wet fragrant mist to diffuse the aroma of the essential oil. Quiet ultrasonic humidifier provides moisture for dry environments, cold/ flu season, sinus irritation, dry skin. Refresh and moisturize the quality of the air we breathe. Humidifies dry air in the room during summer and when the heater is on in winter.