Always work safely
The LiveTool Indicator is designed to help prevent accident or injury from accidental startup or other electrical hazards. A blue LED light illuminates when the tool is plugged in and power is available to begin work. For safety reasons, you should always disconnect your tool from its power source when removing or changing accessories (such as grinding discs, router bits or drill bits). This is helpful in preventing accidents and injury, and any safety feature added to a power tool is a welcome addition.