Overview The Schumann wave does not directly enhance o or video performance but influences the spatial environment to promote physical and mental relaxation. It may support overall well-being, enhance perception of sound and visuals, 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. Two models available: the green model provides sine wave output only; the black model supports sine wave, square wave, and inverted square wave outputs simultaneously. 4. Utilizes a digital circuit with crystal oscillator frequency reference for improved stability and stronger resistance to interference. 5. Powered via DC5.5*2.1mm jack or Micro USB interface, compatible with power banks, USB chargers, or other standard USB power sources. Specifications Black Standard Model: - Antenna Waveform: Sine wave - Output Waveforms: Sine wave, square wave, inverted square wave (simultaneous output via lower-left interface) - Power Input: DC5.5*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 Dimensions: Approx. 15 x 14cm - With Enclosure Dimensions: Approx. 15.5 x 14.5 x 2.8cm Green Version: - Antenna Waveform: Sine wave - Output Waveform: Sine wave only - Power Input: 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 Dimensions: Approx. 15 x 10cm - With Enclosure Dimensions: Approx. 15.5 x 10.5 x 2.8cm Frequency Adjustment Method Enter the desired frequency using the keypad. For example, press [7][8][3], then press [OK] to set 7.83Hz. The default frequency is 7.83Hz. Adjustable range: 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 case, as selected) 1 x USB Cable