... impedance matching , without manual adjustment.6. Multi - antenna and channel, direct display cable burial depth.7. Searching and measuring 50Hz running ... year.Specifications: SpecsTransmitterSize16cm*16 cm*39 cmWeight3.6 kgOutput modeDirect Connect, Linductively, CoupledOutput frequency Trace mode577Hz,8kHz,33kHz,133kHzTone mode577Hz&133kHz ...