Howdie

How effective are these little devices?

Do they live up to what they say they can?

I would like to use such devices for audio learning.
So can one attach such a device to a CD player, and get maximum benefits in the accelerated learning frame of mind by keeping you in an ideal state of learning whilst listening to your personal development CD?
If so, how exactly dose this work?

Any feedback on the above greatly appreciated.

Many Thanks
Captain MOrgan