Works great in a cigar box guitar

I use these to amplify mountain dulcimers

I don't do any sort of serious recording with this, but it works if I'm just trying to get a quick recording in if there is a lot of background noise

Sometimes I just let the jack hang loose over my leg if I'm sitting on the sofa

No idea what the velcro and file clip are for

However, if you clip this (binder clip amusingly included) to a nylon string acoustic guitar and then run that signal into a Boss GT-10 effects processor, you will get an astonishingly awesome collection of tones