The Pureguardian 70-Hour Ultrasonic Humidifier alleviates you from the unpleasant task of scrubbing slimy mold and mildew out of the chamber. This humidifier employs Silver Clean technology to fight the growth of mold and mildew on the surface of the water tank. Plus, you won't be disturbed thanks to its ultra-quiet operation. Comes with an aromatherapy tray in the back for your favourite essential oils! | PureGuardian H965AR 70-Hr Ultrasonic Humidifier with Aromatherapy Tray - Blue