It came very quickly, in a week with a penny, delivered to the door. In general, a very convenient device. For a long time did not update the tester, and here at a discount was... With a certain degree of accuracy, you can search for hidden wiring, you can determine the phase output of the socket, you can find a broken phase wire. But to find a break of zero, it is clear that you will not find... In general, as an inexpensive convenient probe is suitable. Packed well, batteries in the kit do not go.