DEMO! RD7100 DL T10 CLEAN NO REAL FIELD TIME ON THIS ONE! its been sitting on a shelf! Verified for function and calibration guaranteed to be ready to go to work right out of the box! Loaded with 512Hz, 640Hz, 8kHz, 33kHz & 65kHz Sonde 512Hz 640Hz 8kHz 33 kHz Passive 60 Cycle ,Radio & CPS.