Everything you install using electricity will be measured in amps. Having this meter is an absolute necessity in the Christmas lighting business. This Sears Craftsman meter can read the amount of amps you're using at a particular outlet and even at the main electrical panel. Don't worry- this meter is very easy to use and read. AC Splitter (# 20925 sold separately) is necessary for the clamp-on meter to read amps at outlets. Great for trouble shooting when overloading a breaker/fuse. Can read AC current, DC voltage, AC voltage, Resistance and Diode/continuity. Full one year warranty through Sears.
