The Official Sound Conditioner of the National Sleep Foundation - this is what Serious Sleep is all about. The asymmetrical fan creates a soothing sound of rushing air without moving actual air. This natural white noise" sound has been proven to effectively block noises at a broad range of tones so you can get deep undisturbed sleep all night long. Unique asymmetrical fan creates natural white noise without moving air Blocks tinnitus and background noises in a range of tones Fully adjustable tone and volume control Features: Up to 75dB amplification Two speeds Volume control Tone control allows you to match the tone of your tinnitus blocking it more effectively Simple twist operation Integrated vibration dampening rubber feet for improved sound quality A/C Powered Dimensions: 5 3/4" base diameter 3 1/4" high Warranty One year limited warranty Brand Marpac Product Type Tinnitus Masker UPC 036005003500 What's in the Box Dohm with electrical plug attached