5.?Quality Materials & Warm Gifts? SmartDevil Desktop Humidifier is made from the finest durable ABS material to provide long-lasting usability. It is designed to perfectly match every occasion. A great gift for men or women on important days such as birthdays, holidays and housewarming. 4.?Two Spray Modes? The cool-mist humidifiers contains 2 Spray Modes: Continuous Spray & Intermittent Spray. First single press mist button to start the Continuous Mist Mode; Second time press mist button to switch to Intermittent Mode. The duration of the spray can last up to 12 hours, the Intermittent spray can last up to 18 hours. 3.?Waterless Auto-Off & Powered by USB? The vaporizer humidifier will automatically shut off when water runs out. This USB humidifier is powered by USB cable(interface of computer, laptop, adapter, power bank). No AC Adapter in box, one USB cable is included. 2.?Large Capacity & Large Spray? The liquid water is atomized into micron-sized water particles by ultrasonic vibration. The air humidifier diffuser with tank capacity is 500ml, the fine spray are used to increase the air humidity. It is a good companion for air-conditioned rooms. 1.?Whisper-Quiet & Night Light Function? Silence operation below 30dB allows you to sleep easily in a comfortable and quiet environment. The portable mini humidifier for baby has two modes of night light function, constant light mode & breathing light mode(Long press the button to control).