1. Sleep Sounds - The white noise sound machine includes sounds such as campfires, sea waves, crickets, running water, birdsong, thunder, rain and singing bowl. Each sound has a unique soothing track and independent volume control, allowing for 255+ combinations. Additionally, the sleep sound machine creates a personalized sleeping, relaxation, or calming experience for both adults and children. 2.Powerful 10W Bluetooth Speaker - With professional acoustic design and dual 5W output speakers, every sound, from chirping birds to your daily songs, feels incredibly real and immersive. Use Bluetooth 5.0 to connect and transmit your favorite songs via the white noise box, transforming your noise machine into a high-quality speaker. 3.3 Timer Shutdown Settings - The sleep aid sound machine has 3 timer settings, in natural sound or Bluetooth mode, you can set the machine to off after 30, 60 or 90 minutes automatically. Set a timer for it to turn off auto when you go to sleep to make it more adaptable to your sleeping habits. You also don't need to to the room to turn the machine off again after your falls asleep resulting in waking him up. 4.Rechargeable and Worry- on The Go - The portable sound machine has a compact size and a built-in 1800mAh battery, easily lasts through the night and into daytime naps on a single charge. No more worries about purchasing batteries or searching for power outlets. You can take the portable white noise on-the-go with ease, or place it in wherever you need to be.