Lisle 29050 Digital Circuit Tester (3-30V)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Operating range of 3-30 volts DC to work on most vehicle electrical systems</li><li>Two LEDs provide 360 Degree visibility of polarity</li><li>The red light indicates positive polarity， green indicates negative polarity</li><li>Heavy-duty alligator clamp for secure connections</li><li>The probe is insulated to prevent the possibility of shorting the side of the probe to other components Computer safe</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41hsvKzL-6L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51-BuzoR5wL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ISLwog-8L.jpg" noproxy>