"Kit consists of the CDV-715 (item #113701), the CDV-717 (item #346301), and the CDV-720 (item #346401). Buy all three at a savings with this kit!! We offer these units as tested, having passed the "circuit check" test and "meter zero" test (not calibrated) and also as untested or non-functional (item #352001), which offers a lower cost option for the cold-war collector! Requires standard "D" batteries.