Battery powered continuity tester designed to test electric matches prior to attaching to any device. Current is well below 50mA.
Simply touch one wire of an electric match to the button battery and the other wire to the metal contact on the other side and an LED will light up if the match is good (has continuity).
Very lightweight, this new tester comes attached to a string that you can wear around your neck and becomes an instant conversation starter with pyro groupies of the opposite sex. Worth it's weight in gold for that application alone. No pyro neck should be without one. Approximately 1" x 2".