Stock Delco Electronics head unit out of an Astro. I imagine this fits s10 and many other GM cars as well. Volume, balance, tune, fade, am/fm selector, trem and bass switches and knobs. Basic rewind/fast-forward, seek and eject. Seven presets. Cassette. No anti theft on radio. model#16194545. Face plate is 8.125"X3.625". (951)941-8438