automotive sound level meter, Automotive Spark Indicator, automotive tachometer, automotive ... Gloss Meter, automotive painting thickness meter, automotive refractometer, automotive sound level meter, Automotive Spark Indicator, automotive tachometer, automotive tire ... ±1.5dBFrequency Range31.5HZ-8.5KHZLinearity Range50dBAC/DC Output√Auto Power Shut Off√Low Battery Indication√Over Range Indication√ ...