Lisle 24550 Computer Safe Circuit Tester<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Also indicates polarity</li><li>Won't damage sensitive electronic components</li><li>Draws less than 21mA at 12 volts DC</li><li>Operating range 3-28 volts</li><li>The red light indicates positive polarity， green indicates negative polarity</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31wh2ast%2B-L.jpg" noproxy>