KDT2423 Features: -Indicates direction of current flow without breaking into lines.-Starter current scale: 600-0-600.-Alternator current scale: 75-0-75KD tools made it simple with this Current Indicator, no need to break into the line. Simply place meter on the wire. Then crank the engine to check starter current. Run the engine to check alternator current. It doesn"t get any easier! Made for everyday use..-Current Indicator. Specifications: -Measures alternator and starter DC current in 6, 12 and 24 volt systems. Warranty: -Lifetime warranty does not cover abuse.