Introducing the Serenity Portable White Noise Machine by Sleep and Sound. Get ready for the ultimate in sleep-friendly tranquil atmospheres with this device. It's perfectly designed for on-the-go convenience and maximum ease of use. It has 24 soothing sounds to choose from, so you can make sure your little one is lulled into slumber no matter where they are. Lightweight and perfect for travel, the Serenity Portable White Noise machine is an ideal companion for babies who need peaceful and restful sleep no matter where they may be.