Shell: 50% ABS + 50% PP Power source: Rechargeable battery Battery capacity: 800mAh Charging time: 1 hour Working time: Up to 50 hours This device is designed to support relaxation and improve sleep quality. It features multiple sound modes to help create a calming environment. White noise, characterized by equal intensity across frequency components, helps mask disruptive background sounds, allowing the brain to filter out disturbances that may affect rest. Includes 9 natural sound options: flowing water, rainfall, white noise, ocean waves, cricket sounds, bird sounds, and lullabies (3 variations). These sounds help reduce environmental noise, promote focus, and support a restful atmosphere. Features intelligent timer settings with three duration options: 15 minutes (indicated by red light), 30 minutes (green light), and 60 minutes (blue light). Automatic shutdown helps conserve power. Ergonomic button layout ensures simple and intuitive operation. Suitable for use during sleep, study, or relaxation.