Microprocessor controlled circuitry for increased reliability Two-line polarity indication for fast outlet identification Automatic shutoff to prevent battery drain Snag-proof boot prevents broken plug tabs Convenient wrist/hanging lanyard Three distinct, selectable tone signal outputs for multiple line identification Two selectable tone power outputs for use on open and shorted pairs Independent continuity test function Independent … <a href="https://www.tempocom.com/products/tone-generator/">Continued</a>