Tone generator provides audible tone on pair one which is inductively (non-contact) picked up and amplified using the Tracer. Continuity test and talk battery can also be provided. 9V battery provides 6.5 Volts of output. Has modular plug and separate alligator clips for pair connection. The Tracer has adjustable volume and a momentary activation switch. Tip is non-conductive, eliminating shorts when running terminal blocks. Tone generator includes snagless RJ11 modular plug. Both operate on 9V batteries, not included. Kit includes both units and durable Cordura holster case. Made by Greenlee.