Greenlee 2007 Closed Circuit Wire Tracer finds wires behind walls, traces concealed circuits, finds breakers for closed circuits. It is a universal circuit tracer and breaker finder each tech should have.
Traces circuits in nonmetallic conduit
Finds shorts to ground
Supports transmitter-to-receiver distances up to 4 miles (6.5 km)
Accessories included: transmitter plug, (2) receptacle blades, test leads, (1)
9V battery, carrying case
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 
