1. Natural frequency 7.83 Hz: Our Schumann resonance generator is preset to the standard frequency of 7.83 Hz, aligning with Earth's natural resonance. This supports relaxation of body and mind, enhances overall well-being, and creates a calming environment. 2. Quality protective casing: Made from durable ABS material with a transparent acrylic dust cover, this Schumann resonance sine wave generator combines durability with sleek design. It helps protect internal electronic components from dust and physical impact. 3. Versatile waveform selection: The generator provides three waveform options—sine wave, square wave, and inverted square wave—to support various applications. Users can select the preferred waveform based on their needs. 4. Convenient USB power supply: Powered via a standard USB interface, this device does not require an external power adapter. It offers reliable operation at home or on the go.