Armada Technologies Pro-200 Inductive Tone Probe features are: Works with any tone generator to identify wires; Trace and identify wires or cables within a group; Volume control for increased sensitivity and adjustable to suit work environment; Monitor jack for headset connection; Recessed momentary ON/OFF button prevents battery drain; Plastic antenna tip prevents shorting of adjacent cable pairs; Use standard 9V battery for operation. Warranty: 12 Months Warranty.