ZRCN Inc. designs, manufactures, and sells electronic-based consumer hardware for professional contractors and do-it-yourselfers in the United States, Canada, Europe, Japan, and internationally. The company offers stud finders, metal and water detectors, electrical, drill guides, and water levels. It sells its products through retail outlets. ZRCN Inc. was formerly known as Harmony Energy Technologies Corporation and changed its name to ZRCN Inc. in April 2023. The company was founded in 1977 and is headquartered in Campbell, California.