Sensitivity adjustment dial is a Calterm exclusive feature that allows isolation of a specific plug wire and eliminates false signals from wires routed in close proximity
Sensitivity adjustment dial is a Calterm exclusive feature that allows isolation of a specific plug wire and eliminates false signals from wires routed in close proximity
Green LED indicates that the tester and batteries are operating properly
Red LED flashes each time voltage is released from the coil through the spark plug wire
Rugged high-impact ABS housing resists oil and endures shop conditions