... . Transmitter:Frequency : Low frequency,medium frequency,high frequency,radio frequencyMode: Direct connection,clamping,inductionMatched load: 5ohm—3000ohmImpedance display ... 16×39CMReceiver:Frequency: Low frequency,medium frequency,high frequency,radio frequency 50HZAntenna: Peak,NullVoice indication: FM voice changing ... )Maximum detecting ditance: the well-insulated cable Integrated Cable Detector