The Vivitar 102 is a compact, entry-level electronic strobe designed to replace the disposable flashcubes and bulbs of the mid-20th century. It features a standard "hot shoe" mount for direct communication with the camera, as well as an integrated PC sync cord for use with older cameras (like the Nikkormat or Pentax K1000) that require a wired connection to trigger the flash. On the rear of the unit is a mechanical exposure calculator dial; the photographer would rotate this to align the film's ASA (ISO) with the distance to the subject, which would then indicate the correct f-stop to set on the camera lens. Powered by two standard AA batteries, the Vivitar 102 was a staple accessory for amateur photographers, offering a cost-effective and reliable way to provide supplemental light in interior or low-light environments.