Automatically switch off when waterless Water gauge on the back Low noise,mist adjustment Ceramic filter Advantage:1. With indicator when waterless.2. 16 hours continues whisper-quiet operation.3. Auto shut-off when water runs out for additional safety .4. Easy control the mist as per your needs. Technical Data:Voltage:110/220V 50-60HzCapacit:3.7LNoise:≤35dBMoisture capacity:300ml/hRated power: ...