About this item 6 SOOTHING SLEEP SOUNDS – The six white noise machine sounds include Rain, Brook, Ocean (no seagulls), Thunder, White Noise, and Summer Night. The sleep machine sounds help you drift off to sleep faster and wake up feeling refreshed in the morning. MASK BACKGROUND NOISES: The white noise sound machine blocks background noise like noisy neighbors and snoring. Use the white noise machine for office privacy. The sleep sound machine is great for adults and kids. Makes a great baby sound machine! OPTIONAL AUTO-OFF TIMER: Leave the sound on all night or use the optional timer that can be set for 15, 30 or 60 minutes. This rain machine is perfect for helping you fall asleep and prevents your sleep from being disturbed during the night PORTABLE & COMPACT - The portable, compact design makes this sleek Big Red Rooster noise machine essential for home or travel. Easily pack it into your luggage or bag for on-the-go convenience, or place it in your bedroom or living room for calming sounds anywhere in your home. It also makes a great white noise machine for office privacy - a great noice cancelling machine for the office! PLUG IN OR BATTERY OPERATED: Powered by an AC adaptor (included) or 3 AA batteries. The AC adapter is designed to work at 110-240V making it a great white noise machine for sleeping during international travel.