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. The asymmetrical fan creates soothing soundsof 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 Features: Up to 75dB amplification Two Speeds Fully adjustable tone and control Simple twist operation Integrated vibration dampening rubber feet for improved sound quality AC/Powered Dimensions: 5-3/4" base diameter, 3-1/4"high Feature Details Brand Yogasleep Mfg part # 3500200 UPC 036005009816 Color Tan / Beige / Natural Weight (lbs) 2 Battery operated? No Country of Manufacture United States Travel / Portable No Alarm Clock No Radio No Bluetooth No Smartphone Compatibility iOS Android No No Sound Source Fan # of sounds 1 Run Time(s) Continuous 30 min 60 min 90 min Yes No No No