Tone and Probe Kit, Testing Functions Tone Detection, Tone Generation, Adapters Included RJ11, Connector Type RJ11, Data Safe Monitor No, Display Screen Type LED, For Use With Telephone Jacks, Includes 60 Hz Filter, Carrying Case, Maximum Cable Length 10 mi, Wire Mapping Detections Opens, Shorts, Alert Type Light, Port Number Display No, Waterproof No, Product Type Tone Generator and Probe Kit, Operating Voltage 60V DC, Calibration Certificate Not Included, Maximum Impedance Measured 600 ohm