Dc 5V 7.83Hz Schumann Resonance Ultra-Low Frequency Pulse Wave Generator Audio With Box

Delivery was ok, quite fast and nicely packed. The initial frequency setting was at 8.5Hz. So one has to adjust the resitor knob to match the correct frequency of 7.83 Hz. This can be controlled by using an oscilloscope between pin3 (signal OUT) and pin1 (GND)) at the NE555 IC. I also checked the oscillating magnetic field from outside of the box with a magnetometer which shows a clear and strong signal. The magnitude of the field, however, decreases rapidly within 10 to 20 cm distance. But this of course is the effect of the low frequency wich naturally cannot reach far. All in all I think this is a good buy and much cheaper than other providers. Let's see, if there is an effect on sleep behaviour now.

DIY kit of plexiglass. Very good finished. Haven't tested! I wonder if I'm there by better go sleeping. The shipping was within 10 days to Netherlands. Plexiglass construction kit. Very well finished. Not tested yet! I wonder if it will help me sleep better. The shipment was within 10 days to the Netherlands.

Item received in good condition. The transparent box need to assemble ourselves. After connected with power, the blue LED start blinking. Can’t really tell whether it really generating the Schumann wave.

Got on time, so until the effect did not understand can need time so looked ocylograph aplyuda is on the contour :) the amount until it came down :)

Tube dispute by which he had canceled the order But the packet surprisingly came, very happy, apologies to the seller. Good seller

Seems to work for me. I awake more easily in the morning. Intermittently stops blinking but starts if I slap it.

Great product arrived soon, lack the instructions for assembly but the rest is perfect advice seller

I slept with it under my pillow and woke up with a headache. The flashing LED is way too bright.

Looks ok. Trying to figure out how to put it together. Will do a review again if it works.

Weird thing. Slightly heated and flashing LED. That's it. Hear some sound waves unreal

Very quickly delivered this time i always use this product by mobile battery Thank you

wow....that was fast. happy with the transaction. I received it within one week!

I arrived well but the rubber rings were missing to place as a base

Beautiful product and fast delivery called the yellow foil remove

Great product fà its function of relaxing and improve sleep

Arrived quickly and looks good. Will test soon.

Received 100% accurate precision. Not Tested

I get a more sleep for rest it really works.

had to tune a little bit but it works fine

Item as described thank you

Everything is fine! Thanks!

Good product

Very good.

excelente

Thanks!

Perfekt

top !

Good