Older buildings that may not have been wired to code can mean drastic problems for wand users. The grounded circuit of a Violet Wand is only safe for operation when the building is wired properly. This handy portable circuit tester makes a quick check for proper grounded wiring wherever you travel. Just plug it in to the outlet you wish to use and easy indicator lights tell you whether the wiring to that outlet is safe. Quick peace of mind while playing.