Greenlee Textron  TM-700T Tele-Mate Pro Telephone Test Set with ABN "Bed Of Nails" Croc Clips And RJ11 LCD for easy dialing, programming, caller ID, voltage, current, ringing, and DTMF measurements Luminescent, glow in the dark, keypad Super impedance amplifier to monitor lines without disrupting traffic Tone and pule dialing for old and new phone lines with pause and flash (TBR) Headset included for hands free operation, with loudspeaker option