[Large Capacity & Large Spray] The liquid water is atomized into micron-sized water particles by ultrasonic vibration. The large volume of 500ml and the fine spray are used to increase the air humidity. It is a good companion for air-conditioned rooms.Note:Humidifier is recommended to use clean tap water or mineral water.Ban to use pure water or distilled water, which will cause water to accumulate in the mist outlet of the humidifier.[Silent Operation & Night Light Function] Silence operation below 30dB allows you to sleep easily in a comfortable and quiet environment. There are two modes of night light function, constant light mode & breathing light mode, you can adjust according to your favorite.[Automatic Power Failure & Water Shortage Protection] When the water level of the water tank is lower than the water level probe in the water tank, all spray modes will be automatically turned off to eliminate safety hazards.[Two Spray Modes] This humidifier contains two spray modes: continuous spray & intermittent spray. Click the spray button for the first time to activate continuous spray mode. Click the spray button a second time, switch to the intermittent spray mode (spray 3 seconds to stop for 2 seconds), click the spray button for the third time, turn off the spray. The duration of the spray can last up to 12 hours and the intermittent spray can last up to 18 hours.