Professional Automotive Mechanics Stethoscope Car Engine Block Super Sensitive Diagnostic Tools Auto Tester AnalyzerFeatures:Brand new and high qualityThis mechanics sonar scope helps isolate engine problems by letting you /'hear/' inside engine.Quality chromed-steel construction with soft PVC hose and probeDetectable frequency range: 10HZ--10KHZAnti-shocked designMaterial: Rubber & Plastic & Stainless SteelProbe Length: Approx. 30cmProbe Diameter: Approx. 0.33cmPackage Contents:1pcs * Engine Analyzer