Semoic 7.83Hz Schumann Resonance Ultra-Low Frequency Pulse Generator & Power Bank Audio Resonator Fm783 Schumann Wave Generator

I bought this unit for the Schumann Resonator end of things but having the battery charger built in is another plus . Compared to other sellers on Amazon of this product its quite a good price . It took me a little time to figure out how to switch on / switch off / set timer for the Schumann resonator itself as no manual comes with the unit . The details for the latter I discovered since are however on the Amazon page for this product . There is a visual indicator ( LED ) to indicate the Resonator is working and my dowsing via a pendulum confirms that the unit is producing the 7,83 Hz . All good . When running the Resonator off a fully charged battery you will get approx 12 hours of running time. I would have thought that this would have been higher because as an electronics person I would not expect the resonator to draw much current . So basically if using the Resonator overnight without using the mains electricity one has to charge it every day , this is slightly disappointing for me hence the four star instead of five . Lets now see will the unit stand the test of time in which case if it does not , I will be back re-editing this review.