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Calterm 66331 Description
Calterm Tru-Spark Ignition Firing Indicator features:
- 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.
- Compact design with pocket clip.