This is a Marshall MS series portable micro-amplifier. *Includes the original instruction manual. Size: 14cm x 11cm x 6cm I tested it to see if it produced sound when I first bought it, but I haven't used it since. It's mini-sized and cute, so I've mostly used it as interior decoration, but the Marshall lettering has come off. (It seems to have been attached to the speaker net.) It looks like a toy, but it can get quite loud depending on the volume! The following is quoted from the Marshall HP: "Featuring a shocking 1W of power. With channel switching, battery operation, and a headphone jack, it can also be used as a preamp, so you can play rock and roll anytime."