A modern circuit tester with time tested durability. Quickly and safely tests high and low voltages (power and ground) on all vehicles, including computerized engine and body controls. Tests 6, 12, and 24 volt systems High impedance - current draw less than 18 milliamps to protect sensitive electronic sensors, microprocessors, electronic ignition components and air bags. Dual color LED indicates red for power (high) and green for ground (low) 6" heavy duty, 18 gage dual leads with large battery clips Leads can be attached regardless of polarity Includes Protect-A-Terminal probe adapter to prevent damage to electrical connectors Can be used as a standard, single circuit tester. Instructions included.