STEELMAN 06800 EngineEAR II Stethoscope Features a decibel meter with 7 sound level control settings from 60 decibels to 120 decibels Professional noise-cancelling headphones Non-conductive microphone will help avoid damage to sensitive electrical components Flexible gooseneck shaft enables access to tight or hard to reach spaces Quickly pinpoint noise and location of worn bearings and bushings, noisy valves and lifters, broken or worn gear teeth, faulty fuel injectors, wind or air leaks, annoying squeaks and rattles