AROVEC Humidifier Ultrasonic Top Fill 6L, AroMist-550[Top Fill Design with Warm and Cool Mist] On spot top filling and removable water tank make it more convenient. Tap warm mist button and select in three heat levels, it gives a great feeling of moisturised air, especially in cold season. [Set Humidity and Auto Mode On Off] AroMist 550 is designed to operate within 30% to 90% relative humidity (RH); you can set the desired humidity reliably. It features a smart sensor as Auto Mode function to maintain