Features: Experience the precise Schumann Waves Sine Signal Generator, capable of outputting the 7.83Hz frequency with programmable modulation from 0.1Hz to 30kHz for enhances stability and interferences resistance. This signal generator features a sine Waves antennae waveforms and outputs sine, square, and inverted square Waves simultaneously through its left lower corner powering by a stable DC5V supply. This device to electronics enthusiasts, engineers, and hobbyists who require precise frequency generation for various applications. Perfectlyfor use in laboratories, educational setting, or projects where accurate frequency modulation is essential, ensuring reliable performances across diversed environment. Offering efficient power consumption of less than 1W, making it a 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 Size：about 14x15cm/5.51x5.91in Component:ABS 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.