This excellent brain toner binaural beat track was created as a sound aid while you work or study. Ideal as an ambient sound accompaniment, the frequencies used...
This Mini speaker is the combination of classic and modern with metal shell. It adopts micro aluminum rouse membrane for high quality, clear, and pure sound eff...
A Battery Which Can be Used for 5000 Year After Recharge it once....
Why did they change the tuning frequency from 432 Hertz to 440 hertz? was there a conspiracy behind the change? Music that plays at 432 hertz, seems to make peo...