Versatile Type C Power Supply: Suitable for phone chargers and, equipped with a 2000mAh built in battery for extended use Quiet Operations Design: Without noise electromagnetic field output with not mechanical fan disturbance, ensuring absolute quietness Perfect for sensitive individuals or creative environments, eliminating sound pollution from traditional white noise devices Scientific Grade Waveform Output: Utilizes precisions circuitry to generate clean sine waves, gently influencing human bioelectricity Ideal for high stress professional, restoring natural ionospheric resonance conditions Precise waves Generation: Features 7.83Hz sine waves technology to accurately simulate Earth ' s resonance frequency, effectively addressing electromagnetic interferences issues in electronic devices Portable Field Optimizers: Compact 100mm design weighing only 0.41kg, easily fits on desktops or in travel bags Enables field management compared to heavy traditional frequency regulators, Manufacturer: Oxxggkao