Using the Klein 69409 Line Splitter is easy. First, make sure you're using a North American-style outlet. Plug the line splitter into the outlet. Then, if you're using a Klein clamp meter or other compatible clamp meters, you can measure the current draw up to 15A without splitting the power cord. You can also use standard multimeter probes to perform voltage checks. There's a 10X measurement mode for more accurate readings with less precise or higher-ranged clamp meters. When using it, always handle it carefully as it has a 3.3' (1 m) drop protection. Don't use it with non - North American style outlets. To maintain this line splitter, keep it in a dry place and clean it with a soft, dry cloth if it gets dirty. It's a reliable tool for your electrical measurement needs.