White Noise Machine This White Noise Machine Provides Soothing Sounds That Are Perfect For Assisting With Sleep Amp Providing Ambience For Home Office Nursery Amp Travel Ideal For Adults Children Amp Babies Its The Perfect Holiday Or Christmas Gift For Anyoneportable Amp Compact This 5 X 2 Machine Is Powered By An Included Usb Cable Or 4 Aa Batteries Not Included For A Travelfriendly Sleep Aid Use The Builtin Speakers Or Your Own Headphonesspecial Features Choose From 16 Soothing Preloaded Audio Tracks 20 Levels Of Volume Amp 5 Levels Of Bright