The 179 true-rms multi meter has the features needed to find the most electrical and hvac problems. It s simple to use with significant improvements over the original. this particular 179 has more measurement functions, conformance to the latest safety standards and a much larger display that s easier to view. also it can withstand transient impulses in excess of 8000 v to help protect you from arc blasts resulting from surges and spikes. this combo kit includes the following: silicone test leads, industrial test probes, heavy-duty alligator clips, integrated temperature probe, and a non-contact voltage tester, all included in a soft side case.