Like the kick with the coffee and its caffeine, these frequencies of this MP3 causes a similar stimulating condition that makes awake and a little turning up. It is only much healthier as you were really drinking coffee with caffeine. It makes you really awake!
This MP3 has a plurality of frequencies to which a background noise has been added tp prevent headache, with additional music and sounds.
The MP3 is equally suitable for beginners and advanced.