Testboy-Contact-Less-Voltage-Tester-with-Acoustical-Signal-Testboy-Testboy-113-P-The-Testboy-113-is-a-Contact-Less-Voltage-Tester-with-Acoustical-Signal-&-further-development-of-the-proven-Testboy-110-Due-to-the-fact-that-it-is-so-easy-to-operate-&-the-diversity-of-options-for-its-use-in-a-wide-variety-of-applications-it-should-be-part-of-the-basic-equipment-of-both-DIY-enthusiasts-&-professional-electricians-alike-P-P-Made-of-impact-resistant-&-unbreakable-ABS-plastic-the-housi