The Vevor portable sound machine is designed to create a calmer sleep environment with 21 high-fidelity sound options, including white noise, fan sounds, and nature effects. Its compact 3-in-1 design includes a hangable body, soft ring light, timer settings, and memory function for convenient nighttime use. A built-in 1800mAh rechargeable lithium battery supports cordless use at home or while traveling. This model is suitable for babies, adults, office use, and travel where soothing background sound can improve rest and relaxation.