With Ultrasound Humidification Technology: Energy-Efficient And Quiet For Room Fragrancing - Suitable For Aroma Oils With Night Mode: Quiet Operation And No Bright Lights With Ultrasound Humidification Technology: Energy-Efficient And Quiet For Room Fragrancing - Suitable For Aroma Oils With Night Mode: Quiet Operation And No Bright Lights 2 Levels Extremely Quiet Operation Removable Water Tank Led Indicators: White And Blue Leds Indicate Different Atomisation Levels, While Red Signifies An Empty Water Tank Automatic Switch-Off 2 Levels Incl. 15 Aroma Pads For Use With Aromas And Cleaning Brush.