[color gradient] the combination of light and fog produces the effect of a burning flame.The warm light relaxes the atmosphere.You can choose between a color gradient or a fixed color light.[aromatherapy and humidification] capacity 130ml, on the bed or on the desk, it can give us fragrance when humidified.Do not connect your device to a computer when using an aromatherapy device.[water shortage and power outage] After filling the water, you can continue to work for 6 - 8 hours.When all the water evaporates, the aroma diffuser will automatically turn off and stop working.[simple and sturdy design] The aroma diffuser consists of a body and a cover.Press the key switch, long press for three seconds to start.USB Powered: This Flame air aroma diffuser is powered by USB cable, safe and convenient to use (USB cable included)