ROBUST VOLUME CONTROL & TIMER: Simply turn on the and tune everything else out. features a robust volume control - from whisper quiet to quite mighty - plus two timer options.EFFECTIVELY CANCELS NOISE: Beloved by generations since 1962, by Marpac is the trusted leader in white noise sound machines, makers of the original fan-based white noise and the soothing ambient sounds of rushing air. Our signature sound that has helped millions experience better sleep for generations is now available in this light and portable design, along with 16 additional sound options. Choose from simple white noise or select melodies designed to relax the body and calm the mind. The effectively blocks out noises that may disturb or distract, for improved sleep and concentration.COMPACT DESIGN: s sleek design fits in anywhere. You can even take your sleep environment with you to get better rest on the road. 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. USB Powered. NOTE: Wall power adapter plug not included.16 SOOTHING SOUNDS: Choose from eight white noise options, including 'fan' or the popular 'signature sound' of the Dohm - or opt for nature sounds, sleep songs, or meditation soundtracks. lets you take control of your sound environment, excellently masking background noise and allowing for better sleep, office privacy, effective soothing for kids and babies, and calming for sound-sensitive dogs.UNBEATABLE QUALITY & GUARANTEE: Sleeping is believing. For over 60 years, by Marpac has been the gold standard in white noise machines - read the reviews and you'll learn why. Backed by a one-year limited warranty and the always exceptional customer service promise, we stand behind each product and offer you a 101 night trial to try it out.