Dohm-Ds: This product is the Official Sound Conditioner of the National Sleep Foundation. It has been thouroughly tested for effectiveness.
Patented Sound: This unit uses the Marpac Signature Sound System to create the sound of wind without creating an additional air flow.
Fully Adjustable: This product uses an acoustic dual speed fan to create white noise. You get maximum adjustability with this type of design.
Warranty: A 1-year manufacturer’s warranty is included with this device. Only quality materials were used in the construction of this unit.
Fewer Sound Options: This unit uses a fan to create white noise. You do not have any natural or water sound options on this unit.