FALL ASLEEP FASTER AND SLEEP MORE SOUNDLY. This white noise machine helps block out background noise and sudden, unexpected sounds so you can fully relax.nFIND THE RIGHT SOUND FOR YOUR PREFERENCES. Features 10 soothing soundtracks with no detectable reset/loop to startle your sleep. Choose from White Noise, Rain, Birds, Brook, Lullaby 1, Lullaby 2, Ocean, Typhoon, Thunder, and Brown Noise. Test out each high-quality, calming track with a simple twist of the knob.nGET A GOOD NIGHTu0026#39;S SLEEP, EVEN WHILE TRAVELING. Sturdy, portable unit runs on both outlet and battery power. When at home, at the office, in babyu0026#39;s room, just plug into any standard outlet. To take on the go, add 4 AA batteries (not included).nLISTEN JUST LONG ENOUGH TO GET TO SLEEP, OR LET IT RUN ALL NIGHT. Push Timer1 button for one hour of soothing sounds. Push Timer2 button for 2 hours. Or press the power button to let it run (and help you stay asleep) all night long.nLIFETIME REPLACEMENT GUARANTEE. We are a small family-owned business and proudly offer only top quality products with lifetime manufacturer warranties. If you ever have problems with the unit, our US-based customer service team will replace it right away.nNATURALLY BLOCK OUT BACKGROUND NOISE TO HELP YOU GO TO SLEEP FASTER AND SLEEP SOUNDER!