ONE-TOUCH SWITCH & COMPACT -- Easy operation with just one touch, 2 speed options; Cup design fits perfectly in most vehicle cup holders. (Package includes USB cable only, adapter not included) COMPACT CAPACITY - 100ml container with 2 spray modes: if there is enough water, it can spray continuously for 3 hours (the spray will stop at 9-second intervals, support up to 3 hours) Totally Silent and BPA Free - Totally silent without making any annoying noises. It automatically shuts off when the water level falls below the low water mark or tilts 90 degrees to ensure a longer lifespan Bring Nature to Your Car - Ultrasonic technology Effectively delivers an ultra-fine and smooth even aromatherapy mist, the easiest way to maintain a fresh, humid and odor-free environment in your car GREAT GIFT IDEA - Diffuser and humidifier for any small area and Perfect Mini USB Humidifier Portable for any small area, such as car, work desk, bedroom, etc. The perfect high-tech gift idea that everyone will love.