Klein Tools gave me a free product and additional incentives for honest evaluation of this product. The NCVT-4IR voltage tester does a great job of multitasking and provides me with valuable troubleshooting information. The IR reader pairs well with our Fluke One handheld and the voltage tester provides a clear visual and audible indication of performance. The backlit LCD works well even in low light conditions. If there were a way to add a flashlight like the NCVT-3, it would make a near-perfect companion for an electrician or mechanic.