24 soothing sounds include wind, rain, thunder, electricity, running water, waves, crickets and birds, as well as lullabies and sleep aid music to help crying babies calm down and stay asleep, and to help adults fall asleep and relax. Built-in recording function captures 180 seconds of sound memory. Compact and lightweight: 4 x 5 x 2 inches; net weight 6 ounces. A lifting ring allows hanging on diaper bags, strollers, cribs, etc. Comfortable lighting: night light with 7 mood colors and 6 adjustable brightness levels. The soft light protects eyesight and provides enough illumination for nighttime care. Long-lasting battery life: built-in 2000 mAh battery. Charging time about 3 hours; playback time over 12 hours on a full charge. Timer options of 30, 60 or 90 minutes with automatic turn-off for both sounds and lights. Bluetooth function: stream your favorite music from a mobile device to the white noise machine. Multiple application scenarios: provides background music for yoga, relaxation, meditation, concentration, office privacy, sleep, walking, driving, travel, hotel stays. Not only helps babies and adults sleep, but also soothes noise-sensitive dogs. A good choice for home, office, travel, or nursery.