Features: • The amplifier probe is designed to identify and trace wires or cables within a group without damaging the insulation • Works with any tone generator to identify wires • Volume control for increased sensitivity and adjustable to suit work environment • Recessed On/Off button prevents battery drain • It can be power with only one 9V battery and the device has a long battery life (approx. 100 hours of use) • A plug receptacle is provided for use with a headset or headphone • Red and black test leads are provided, and it has a standard conductor modular cord and plug • A 3-position toggle switch controls the modes of operation plus a 3-colored LED is provided for the line polarity, continuity and voltage testing • A tone selector switch, located inside the test set is provided for choosing either a single solid tone or dual alternating tone (CAUTION: Do´nt connect to an Active AC circuit exceeding 24V in this mode)