The Eclipse Tools MT-7029 is a network POE tone & probe. The optimized probe works with special circuit design to eliminate noise for efficient wire tracing. The POE tone is ideal for general wire tracing and great at POE switches wire tracing. Easy detection of served line, off-hook condition, or incoming call ringing on phone lines. Quickly identify phone line polarity. No more hard to find STP/BNC wires. 300m maximum measuring distance for STP/UTP wire test, PIN to PIN cable mapping, and continuity, short, open, and crossover troubleshooting.