It works on one 9 volt battery, just like a guitar effect pedal.
And this amp plugs straight into guitar, without any cabels,
so it is very easy to use wile walking around somethig.
hope you enjoy it !! )))

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OK i'll try to make it.
If you mean the case, No, it's made of .... cardboard... I've made it myself.
But i bought the speaker in a special shop. (you can take it out of a PC speakers, if you like)
And I've also made my own amp circuit.
a cool idea
i have finaly published an instuctible of a Coffin Gutar amp !!!!
http://www.instructables.com/id/Mini-Coffin-Guitar-Amp-on-battery/
hope you like it ! rate!
Was the shape intentional or was it just to fit circuit?
almost all parts i used i've found at home.
but if you gonna buy those, it would cost about 10$ or less. it depends on were you're buying parts. yeah, probably less, maybe even 5$
and the video :
it only does not fit guitars that have just vertical input jack in front .