The Fluke FLK2AC/90-1000V Non-Contact Voltage Detector is a pocket-sized voltage tester that is used by the do-it-yourself installer or electrician. This easy-to-use voltage detector tests for energized circuits and defective grounds. Voltage detection from 90-1000V ac makes this non-contact voltage detector suitable for a wide range of applications. The Fluke FLK2AC/90-1000V features a battery check button and is always on for fast and convenient testing.