1, Mainly use for the transformer of the cockroach trap,cockroach killer, insect killer and so on. 2, 3v 3, 1 year warranty 3v ... kinds of electronic cockroach, insect killer, small electronic mosquito swatter, etcApplicable to various electronic cockroach, insect killer , small electronic mosquito swatter, etc2,The pictures of the cockroach killer transformer2, The ...