K p electronics manufactures an electronic components cum continuity tester. This is a unique tester which operates on two 1.5 v pencil cells [8 ma max, when in operation]. This electronic continuity tester can test almost all-electronic components such as electrolytic capacitors, band switches, potentiometers, pcb tracks, inductors, transformers, cables, electrical wiring, antenna installations, etc. Electronic continuity testers with has led [light] indication and buzzer [sound] indication are also available.