7.83HZ Generator, Ultra Low Frequency Pulse Generators with Connection Line, for Sound Enhancement and Sleep Aid

Had this for several months. The build quality is questionable – the whole thing is held together by screws that were all very loose and if you tighten them so that it feels sold, then the on/off slider doesn’t move.So you have to get the balance right between a rattly piece of kit and to be able to get it to turn on and off. I can’t really say it’s done anything for me that is tangible, and the only way to validate that is doing ‘something’, is a blue flashing LED whilst on. I will say the battery life is amazing but I wish there was someway to validate that this is in fact producing Sherman waves and not just a piece of acrylic with a flashing LED. The jury is out…!