This is a Sano Hi-Fi Stereophonic amplifier made for guitar and accordion in the late 1950s/early 1960s. It has a really cool vintage vibe and warm tone with a clean, full sound that breaks up when pushed. I love the 50s styling with the curved chrome handle, black, speckled Tolex cover and cursive chrome "Hi-Fi" decal on the front. It comes with a vintage 15" Jensen Concert speaker, EM-1501. The tremolo works (its fairly subtle) with the addition of a quarter inch plug in the tremolo footswitch jack. It has Guitar, Instrument, and Stereophonic inputs. A little rough around the edges with the Tolex coming off in spots, especially the bottom (see pictures), but it works and sounds great.