Overview Reviews Product Description Two LEDs provide 360° visibility of polarity. The probe is insulated to prevent the possibility of shorting the side of the probe to other components. Computer safe. Will not damage sensitive electronic components. Not for use on airbags. Operating range 3-30 volts DC to work on most vehicle electrical systems. 47" cord and heavy-duty alligator clamp for secure connections. Lisle Tools Catalog Product Videos Custom Field Harmonization code HTS #9030333800 Manufacturing country CN Product Reviews Write a Review Write a Review × Lisle 3-30V Digital Circuit Tester 29050 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *