Includes a professional grade tone generator and tracing probe for non-energized wiring Toner-Pro features 5 distinct tone cadences, transmits 1000+ ft. Rugged Angled Bed of Nails (ABN) clips securely attach to wires RJ11 plug easily connects to telephone and RJ45 data jacks to tone wire pair Toner-Pro tests for continuity and polarity with results indicated by clearly labeled LEDs Probe-Pro features 3.5mm headphone jack for noisy environments (headphones not included) Responsive probe with durable non-metallic, replaceable conductive tip (VDV999-068; sold separately) Work light on probe tip for use in dark spaces Terminal block on probe to confirm the toned pair Each tool includes (4) AAA batteries