Low voltage twin probe circuit tester. Tests AC/DC voltage from 5 – 50V AC/DC, 50-60 Hz. indicator glows when voltage is present and brightens as voltage increases. Insulated alligator clip test leads. Dual insulated, durable ABS housing. No batteries required. Tests: low volt outdoor lighting, low volt control panels, door bells, alarm systems, and automotive 12V DC and 36V DC.