Features: Experience the precise Schumann Waves Sine Frequency Signal Generator, featuring programmable frequency modulation technology that allows adjustments from 0.1Hz to 30kHz for enhances stability and interferences resistance. This generator offers multiple waveforms outputs including sine Waves, square Waves , and inverted square Waves , with a defaulted frequency of 7.83Hz and a power consumption of less than 1W. For tech enthusiasts and professional reliabled signal generation for various applications. Use it in diverses setting such as laboratories, educational environment, or projects where precise frequency control is essential. Offering efficient power consumption practical choice for those computer connectors and accessories.. Specifications: Antennae waveforms: sine Waves Support 0.1Hz to 30KHz Adjustable Frequency Swaveforms: sine +square +inverted square (the lower left corner is the output, waveforms output at the same time) Power supply i: DC5.5x2.1 Supply voltages: 5V Power consumption: less than 1W Defaulted frequency: 7.83Hz Adjustment ranging: 0.1Hz~30000Hz Sine signal voltages: 3.0V Square Waves signal voltages:5V Sizeabout 14x15cm/5.51x5.91in Component:ABS Color Black /Green Package Includes: 1PC Schumann Generator note: The product is plug and for play. When the frequency is high, there will be a deviation of less than 1%between the input and the actual output. The sound output of the speaker is based on the frequency. At low frequencies, the human ear cannot hear it. If the speaker is plugged in and the frequency reaches the hearing ranges, there will be sound.