We have been using more traditional equipment for finding leaks and had pretty good results, but there were always some we could not find.  One, in particular, gave us fits. We even brought another reputable leak detection company in, and after two hours they could not find it. We bought the Push Mic Complete Kit with the LT-1000 amplifier and literally within 10-15 minutes, we found the leak.  We then used the FLASH stick and pinpointed it within 1-2 inches.  While no single piece of equipment fits every situation, the Push Mic has become indispensable, a must on each of our leak detection trucks. The entire package of Leaktronics equipment has elevated our competency and our confidence. Thank you for your intense commitment to this field.  Your passion shows.