Beloved by generations since 1962, the Dohm is the original white noise machine. The Uno model features our signature fan-based natural white noise producing the famous Marpac Sound – the soothing ambient sounds of rushing air, without the disturbance of actual moving air or other irritations. With a single-speed option and adjustable tone and volume, the Dohm Uno makes it simple to create a personalized sound environment, excellently masking background sounds and allowing for better sleep, office privacy, effective soothing for kids and babies, and calming for sound-sensitive dogs. Powered by a 6-foot 120V AC plug (for domestic use only), just plug in the Dohm Uno, flip the switch, then rotate the collar to find the best sound for you. Let the noise-masking magic happen for a natural sleep aid, office privacy, baby soothing, tinnitus relief, respite from noisy snorers and unfamiliar hotel rooms, and a relaxing calming balm for barking dogs. The Dohm Uno features a simple and compact design that fits anywhere and blends unobtrusively into surroundings.