This LED indicator plug adapter is a practical and reliable solution for identifying complete circuits. With its red glowing LED indicators, it quickly identifies problem circuits by not lighting up. It fits standard seven-Way blade type, four-way flat connectors, and seven-way round connectors, making it compatible with most makes and models. Constructed of molded PVC, it offers excellent impact resistance. Additionally, it is internally grounded for added safety. Sold individually, this plug adapter is a must-have accessory for anyone looking to simplify circuit identification and ensure seamless connectivity.