This Mini Amplifier might not be a Marshall, its got small speakers and a mini amp disguised inside a pretty neat looking amplifier box with bass and treble adjustment knobs. I highly doubt that the knobs even work, let alone expect any good sound quality out of this little thing. The Mini Amplifier can be powered using 4 AA batteries or a USB cable. While it's not a charging dock, it does have some sort of dock looking stand that will fit an iPod Classic. Connection is made using a 3.5mm audio cable allowing various other music players to be used. A mere working novelty item that you can get for $26.

Thanks for the tip, Kenneth!