CHECK THIS OUT BEFORE YOU BUYBefore use you should install natural Oil-soluble essential oil between the devices. The use of synthetic water-soluble essential oils will prevent the production of aromatherapy mist and affect the diffusion effect, please do not drop essential oils into water for diffusion Long Runtime: With a large water tank capacity, it can run continuously for up to 8 hours without refilling. Easy Operation: Simple controls allow you to adjust the mist output and turn on the optional LED light feature. Quiet Operation: The ultrasonic technology ensures whisper-quiet operation, making it ideal for use in cars, offices, or bedrooms. PRECAUTIONS RELATED TO FRAGRANCE DIFFUSIONThe aromatherapy diffuser has two spray ports, the one on the side is for humidification and atomization, and the one in the middle is for diffusion of pure essential oils.The long cotton swabs are for humidification and the short cotton swabs are for diffusion of essential oils, and both swabs need to be wetted with the corresponding liquid. The long swabs need to be completely wet with water and the short swabs need to be placed in a bottle of essential oils and completely wet with essential oils. (Note: If the short swabs are not completely wet with essential oils, the spray port in the center and the diffuser function will not work properly) GIFT & AFTER-SALE In addition, our humidifier has colorful lighting effects, and its high-quality materials, exquisite appearance and multiple functions make it the best choice for birthday and holiday gifts. It all brings a very good experience to the recipient. If you encounter any problems or have any questions during use, you can always by email, We will provide you with the perfect solution.(For more information about this product, please refer to the product video and A+ content, and read the user manual carefully before use.) Dual Function: It serves as both a humidifier and an aroma diffuser, adding moisture and fragrance to your surroundings. Portable Design: This compact aromatherapy humidifier is perfect for traveling, allowing you to enjoy soothing mist and essential oil scents on the go.