Marshall fans will dig this Mini Guitar Amp. Powered by a 9V battery (not included,) the claim is that it sounds like a full size amp. While that may not be true, it does look like the original and features overdrive, tone and volume control. It comes with a belt clip for those who wander while they jam, and a headphone jack for times of solitude. The 5.75-inch tall mini amplifier is available for $44.99.