Kit includes TONEcube tone generator and PROBEplus tone tracing probe to trace wire paths and identify twisted pair and coax cables in common wiring systems. Amplifier overload LED improves accuracy, warning against misreads. Dual power button with Power-On LED indicator, with recessed buttons to prevent accidental operation. Heavy duty leads with rugged dual-mode modular plug for direct connection RJ11/RJ12 and RJ45 jacks.