Overview The Schumann wave generator is designed to influence the spatial environment, potentially promoting relaxation and enhancing overall well-being. It may help support mental clarity and perception in audio-visual experiences by contributing to a calm environment. The device generates a 7.83Hz frequency, commonly associated with the Earth's natural resonance, and features adjustable output from 0.1Hz to 30kHz. Built with a digital circuit and crystal oscillator for frequency reference, it offers stable performance with strong interference resistance. Features 1. Constructed with high-quality materials for reliable frequency stability. 2. Capable of generating a 7.83Hz Schumann wave and includes programmable frequency tuning, allowing adjustment from 0.1Hz to 30kHz. 3. Available in two versions: the green model provides sine wave output only; the black model supports sine wave, square wave, and inverted square wave outputs, selectable based on user needs. 4. Utilizes a digital circuit with crystal oscillator frequency reference for enhanced stability and reduced interference. 5. Powered via DC 5.5*2.1mm jack or Micro USB interface, compatible with power banks, USB chargers, or any standard USB power source. Specifications Black Standard Model: - Antenna Waveform: Sine wave - Interface Waveform: Sine wave, square wave, and inverted square wave (simultaneous output via lower left interface) - Power Supply Interface: DC 5.5*2.1mm - Supply Voltage: 5V - Rated Power Consumption: <1W - Default Frequency: 7.83Hz - Adjustment Range: 0.1Hz – 30,000Hz - Sine Signal Voltage Amplitude: 3V - Square Wave Signal Voltage Amplitude: 5V - Circuit Board Size: Approx. 15 x 14 cm - With Enclosure Size: Approx. 15.5 x 14.5 x 2.8 cm Green Version: - Antenna Waveform: Sine wave - Interface Waveform: Sine wave - Power Supply Interface: Micro USB - Supply Voltage: 5V - Rated Power Consumption: <1W - Default Frequency: 7.83Hz - Adjustment Range: 0.1Hz – 30,000Hz - Sine Signal Voltage Amplitude: 3V - Square Wave Signal Voltage Amplitude: 5V - Circuit Board Size: Approx. 15 x 10 cm - With Enclosure Size: 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: Press [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 circuit board and plug the USB end into a power bank, USB charger, or other USB-powered device to operate. Package Includes 1 x Schumann Wave Generator (with or without enclosure, as selected) 1 x USB Cable