Gardner Bender VD7500LBCS Non-Contact Voltage Light Bulb & Fuse Tester, 12-600 V AC, Red Non-contact tester DON'T REQUIRE YOU TO TOUCH BARE WIRES Adjustable sensitivity to detect low 12 VAC to 600 VAC with one tool Fuse tester designed into the tool 360 bright red visual indication accompanied by audible beeping announce the presence of voltage Fuse tester designed into the tool