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For years technicians have been inserting a thermometer into A/C vents and pondering with the question, "Is it cold enough?".... Until now! The Smart Gauge A/C Performance Analyzer utilizes a microprocessor which analyzes the ambient and vent temperatures of an A/C system and determines If the performance of the system is acceptable. Easy to use - 1. Install vent probe in center vent 2. Attach ambient probe to front of vehicle 3. Press the Test button and instantly verify A/C performance Displays temperatures in Fahrenheit or Celsius Auto shut-off Diagnostic chart and tech tips included Powered by a standard 9V battery (included) Temperature probes included |