The Urceri Wire Tracker model WT01 is a versatile cable tester that can handle both RJ11 and RJ45 connectors. It also features a NCV probe for added functionality. This battery-operated tool is designed to assist in tracing and diagnosing electrical wiring and network cables with ease. Perfect for professionals in the electrical and networking industries, this multifunctional cable tester is a reliable tool for efficient cable testing and troubleshooting.