Quality Audio Experience: Enjoy a realistic sound experience with our white noise machine, featuring high audio fidelity that immerses you in a serene environment Versatile Sound Options: Equipped with 20 preloaded sound sources, including 5 types of white noise, 5 natural sounds, 9 nature-inspired tunes, and a prenatal melody, without download required Long Battery Life: Powered by a built-in battery, this device charges in just 3 hours and offers an impressive working time of 20-48 hours User-Friendly: Simply turn on the device to start using it without any WiFi setup required. It also features a low battery alert system that notifies you when it's time to recharge Adjustable Timer Settings: Tailor your relaxation sessions with adjustable timer settings that allow you to set playback durations at intervals of 30 minutes, 60 minutes, or 90 minutes before automatically shutting off for convenience and energy efficiency Specification: Material: PP Size Chart: LxWxH: 7.6cmx5.8cmx3cm/2.99inchx2.28inchx1.18inch Package Includes: 1White Noise Machine 1 Charging Cable 1Instruction Manual Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.