Contec SC21 Medical Diagnostic Dual Head Stethoscope

These real stethoscopes will be hours of fun for your young doctor, checking heart rates and lisening to the insides of things.       1.Introduction Product NameStethoscope FunctionEarly Diagnosis Model :/SC21 Main Material: Aluminum Alloy+ PVC Tube Material:PVC Instrument classificationClass I Color: Black, Blue, Yellow   Intended use and characteristic Intended use: it is used to collect and amplify the sound inside body organs like heart, lung, arteries, vein, etc., which is applicable for use in hospital, clinic, examination institution, ambulance, home and camping rescue, etc. Contraindications: no    Characteristics:  100 Hz ~ 500 Hz as the reference of the testing sound source: Outer diameter of auscultation head ≤ 35 mm, damping ≤ 30 dB Outer diameter of auscultation head > 35 mm, damping ≤ 16 dB 500 Hz ~ 1000 Hz as the reference of the testing sound source: Outer diameter of auscultation head ≤ 35 mm, damping ≤ 25 dB   Outer diameter of auscultati