Overview The Schumann wave does not directly enhance audio or video performance but influences the spatial environment to promote physical and mental relaxation. It may support the body's perception of sound and images, contribute to overall well-being, and help reduce psychological stress. Features 1. Constructed with high-quality materials for reliable frequency stability. 2. Capable of generating a 7.83Hz Schumann wave and features programmable frequency tuning, adjustable from 0.1Hz to 30kHz. 3. Available in two models: the green version provides sine wave output only, while the black model supports sine wave, square wave, and inverted square wave outputs—selectable based on application needs. 4. Utilizes a digital circuit with crystal oscillator frequency reference for improved stability and enhanced resistance to interference. 5. Powered via DC 5.5x2.1mm jack or Micro USB interface, compatible with power banks, USB chargers, or other USB power sources. Specifications Black Standard Model: - Antenna Waveform: Sine wave - Output Interface Waveforms: Sine wave, square wave, inverted square wave (simultaneous output from lower-left interface) - Power Input: DC 5.5x2.1mm connector - Supply Voltage: 5V - Rated Power Consumption: <1W - Default Frequency: 7.83Hz - Frequency Adjustment Range: 0.1Hz – 30,000Hz - Sine Signal Voltage Amplitude: 3V - Square Wave Signal Voltage Amplitude: 5V - Circuit Board Dimensions: Approx. 15 x 14 cm - Enclosure Dimensions: Approx. 15.5 x 14.5 x 2.8 cm Green Version: - Antenna Waveform: Sine wave - Output Interface Waveform: Sine wave - Power Input: Micro USB - Supply Voltage: 5V - Rated Power Consumption: <1W - Default Frequency: 7.83Hz - Frequency Adjustment Range: 0.1Hz – 30,000Hz - Sine Signal Voltage Amplitude: 3V - Square Wave Signal Voltage Amplitude: 5V - Circuit Board Dimensions: Approx. 15 x 10 cm - Enclosure Dimensions: Approx. 15.5 x 10.5 x 2.8 cm Frequency Adjustment Method Enter the desired frequency using the keypad. Press the lower-left key to confirm. Example: Enter [7][8][3], then press [OK] to set frequency to 7.83Hz. Default output is 7.83Hz; adjustable range is 0.1Hz to 30kHz. Usage Instructions Connect the included USB cable to the device and plug the USB end into a power bank, USB charger, or any standard USB power source to operate. Package Includes 1 x Schumann Wave Generator (with or without enclosure, as selected) 1 x USB Cable