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Caspers Electronics knock gauges are equipped with 9 LEDs in three colors to indicate the severity of detonation in real-time: Green = mild detonation, yellow = moderate detonation, and red = severe detonation. The center green LED is illuminated during "standby"; and when detonation occurs, upper colored LEDs will display for five seconds, and then reset to standby. They can display knock during each gear change.
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$109.99
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