Supercool little 1/4 watt amplifier handmade in Wales and housed in a traditional jam jar.

The speaker is neatly incorporated into the screw-on lid, and there's a little red LED that lights up when you plug in. Easily accessible 9 volt battery - simply unscrew the lid and to change the battery. Not only is this a handy little practice amp, but thanks to the output jack, you can use it in it in 3 different ways: