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 mostly used it as interior decoration, but the Marshall lettering has come off. (It seems like it was 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."