EM-410 Simple Automotive Stethoscope Noise Detector Description: The Automotive Stethoscope Model EM410 operated by 9 Volts battery, the pick-up sound loudness can be controlled by adjusting its volume control. Feature: Adjustable pick-up loudness control.Headset combined with ear padding to cut out background noises.nterchangeable – 2 Probe heads (60mm and 290mm lengths).Strong probe body, black ABS…