Combines a stud finder, metal detector, live wire tester, outlet tester and GFCI tester in one—everything you need to install electrical boxes, switches and outlets. It scans for wood, metal studs, metal pipes and other objects. Integrated noncontact voltage detector tests for live wires. Built-in metal marking tip marks stud edge or pipe location. Self-contained design includes integrated outlet and GFCI testers. Detects voltage of 50–600VAC. Includes 9V battery.