If youre light sleeper, you know just how difficult it is to get good nights rest with all the distractions around you. This white noise machine is great fix to those noisy problems at night. It has multiple nature sounds rain, birds, ocean, wind, etc., and more. The basic white noise that fills the room with steady stream of many frequencies to relaxation music that will help lull you to sleep. Theres noise machine out there for everyone. Control unwanted, distracting noise so you can sleep and rest better Its relaxing and pleasant to listen to Easy to use, with nature sounds including White noise, Ocean, Thunder, Soothing music, Wind, Brook, Summer night, Rain, Relax Has auto off timers of 15, 30 and 60 minutes Lightweight, so good for travel. Be powered by USB plug, or with four AA batteries not included for wireless listening With volume control knob, you can adjust the volume of the sound Recommended Uses College dorms Health care institutions Apartment living Day care centers Motor homes and RVs Hotels motels Assisted living centers and so on Specifications Diameter4922inch Weight 0.4lbs Power source AC power Input Power 120 220V, 5060HZ Output Power 5V1A Battery Four size AA batteries Timer Yes 15, 30, 60 minutes Sounds White noise, Ocean, Thunder, Soothing music, Wind, Brook, Summer night, Rain, Relax Package Contents White Noise Machine USB Cable User Manual