I have an assortment of meters from the less expensive to the more expensive. While using them to read the value of the measurements is important, I find that more often I just want to know if I have voltage or continuity. So I made a tester, with a horn, that lets me test voltage and continuity. The nice thing is all I have to do is listen for the result. Since I work on 24volt systems the tester works from 1 volt up to 28 volts. I have about 4 of these units and I use them often before I grab that meter. If I need to read a test value I use the meter.