Kit consists of 1 each of: GCT204 continuity tester, GRT500A circuit tester, and GET100A circuit tester. The GCT204 is a heavy-duty continuity tester which tests for continuity in nonenergized circuits with the use of the included 30" test lead with alligator clip; continuity is indicated by the lighting of a bright indicator bulb, this unit uses 2 "AAA" (not included). The GRT500A circuit tester tests and analyzes receptacle circuits in standard 110/125V AC grounded receptacles; the easy-to-read combination of yellow and red lights indicate the wiring condition. The GET100A twin probe circuit tester tests all voltages from 90 to 500V AC/DC, and the neon indicator glows when voltage is present and brightens as voltage increases. This unit comes with an insulated housing, test leads, and pocket clip.