Auto Diagnostic Tool – Car Engine Stethoscope (Easy to Use)

Specifications:

This mechanic’s sonar scope helps isolate engine problems by letting you ‘hear’ inside the engine.
Quality chromed-steel construction with soft PVC hose and probe
Detectable frequency range: 10HZ–10KHZ
Anti-shocked design
Two Probes included:
the longer one is 200mm long,
the shorter other is 80mm long,
the probe diameters are the same, 4mm.