The Vevor portable white noise sound machine is designed to create a calmer sleep environment at home, in the office, or while traveling. It offers 30 soothing high-fidelity sounds across multiple categories, along with a soft ring light for nighttime use. A built-in timer and memory function make it easy to personalize and repeat your preferred settings. Its rechargeable 1200mAh battery and hanging strap add convenient portability for strollers, bedside use, tents, and backpacks.