SIMPLE TO USE: Powered by a 7-foot 120V AC plug, just plug in the , flip the switch to high or low, then rotate the cap and 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 ORIGINAL SOUND MACHINE: Beloved by generations since 1962, the model features our fan-based natural white noise producing our signature sound the soothing ambient sounds of rushing air, without the disturbance of actual moving air.UNBEATABLE QUALITY & GUARANTEE: Sleeping is believing. For over 50 years, by Marpac has been the gold standard in white noise machines - read the reviews and you'll learn why. Assembled for decades in the USA and backed by a one-year limited warranty and the always exceptional customer service promise, we stand behind each product and offer you a 30-day return policyCUSTOMIZED SOUND EXPERIENCE: With two-speed options for adjustable tone and volume, making it simple to create a personalized 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.CLASSIC DESIGN: Featuring a compact and basic design that fits anywhere and blends unobtrusively into surroundings, the White Noise Machine is available in white, black, gray and tan.