Pulse Generator, High Precision Digital Signal Source Generator Arbitrary Waveform Upgraded Version 7.83 Hz Schumann Wave Ultra Low Frequency Pulse Generato

Although this pulse generator is small, toy like, it actually is Effective to promote relaxation & sleep. You also need to purchase a 12v power supply to operate this device. We only plug it to turn on @ night

While I have not attempted to turn the device on yet because it did not come with a power supply (which is expected for the price), it arrived dirty as if it were previously used. It also came with a small screwdriver which was rolling around where the electronics are located and possibly caused damage. There are no instructions. It is marketed as precision, but it’s adjustable? Which is it? I don’t have an oscilloscope to verify what it outputs so I have no idea if this device will perform as claimed. Since there is no instructions or anything with any information, no paper confirming that it was previously set to the correct frequency, I assume you must calibrate it yourself. Not very pleased with this.

It doesn’t look like the one you posted and has no instructions or description with it. I have been using it for two weeks now but nothing is improved, doesn’t work at all