0.001HZ-200KHZ 7.83HZ Schumann Wave Signal Generator DDS Pure Sine Frequency Modulation 1. Using DDS algorithm, the frequency step value can reach 0.001HZ, and the frequency stability is good. 2. This product can not only output 7.830Hz Schumann wave, but also adds programmable frequency modulation technology, which can adjust the frequency in the range of 0.001Hz~200KHz (it can also be used as an ordinary programmable digital signal generator). 3. Digital crystal frequency reference, more stable and stronger anti-interference; 4. The power interface adopts DC5.5 x 2.1 interface, which is easy to use. The USB end can be plugged into the power supply or USB charging head or other USB power supply devices to work. 5. Small and portable, easy to use interface Specifications: 1. Material: electronic components 2. Power supply: DC5V, through USB interface 3. Frequency range: 0.001Hz to 200KHz adjustable 4. Frequency stability: DDS algorithm, step value is 0.001Hz 5. Output: 7.83Hz Schumann resonance and programmable frequency