Goldtool 3 in 1 Tracer , Toner and Cable Tester Kit – Designed to test for Sending , Tracing a tone, Cable continuity, Coaxial , Polarity or to Verify a line Detection cable and wire continuity, cables in walls, Multi-function cable tester for RJ45 LAN, BNC/F coaxial cables, Retail Box, 1 year warranty