Happy Amp is exactly what is claimed for it. Providing you don't turn up the volume too high, it is fairly distortion free. I have a couple of uses for it. Perfect when you want to amplify for a small crowd, say 50 people.
My magic uses
Used with my ventriloquist monkey doll.
Otherwise used to amplify Iphone, Galaxy tab etc
Fits comfortably around the waist with its attached waist band. Put it on and forget it. Comes with a sensitive head mounted microphone.
A good buy, I am pleased with it.