... features of Multi-Frequency, High-Power and Low-Loss. Multi-Frequency Technology facilitate field operation, optimal frequency singal helps ... automatic impedance matching , without manual adjustment.6. Multi - antenna and channel, direct display cable burial ... cmWeight3.6 kgOutput modeDirect Connect, Linductively, CoupledOutput frequency Trace mode577Hz,8kHz,33kHz,133kHzTone mode577Hz&133kHz ...