we can supply Underground Wire Locator Here are brief introduction of our company: Founded in 2000, Shenzhen Noyafa Electronic Co., Ltd is located at the central part of Baoan District, Shenzhen. It is ahightech enterprise specializing in the network, production and marketing of network and optical communication equipment. Description: The Underground Wire Locator is designed to locate the path of non-energized wires behind walls and underground. The 816 is also capable of locating a specific circuit breaker, pinpointing wires before drilling and verifying dig sites underground. The effective range is up to 3 feet deep and up to 1000 feet in length.