[QUICKLY MONITOR NOISE]Electronic Stethoscope can quickly monitor noise for the machines,autos,ships,aircraft and other mechanical equipment, accurate pinpoints noise and location of engine bad bearings,bushingsdirty fuel injectors,wind and air leaks,noisy valves and filters.[PRINCIPLE]Automotive noise detector,when gas or liquid adopts a pore leak, there will be a high-frequency component that can detect leaked Spoiler scanning the nearby area, through earphones that can hear leaks rapids or instructions.[ADJUDT VOLUME CONTROL]Ultrasonic leak detector & transmitter,earphone pick-up sound loudness can be controlled by adjusting its volume control; Consists IC circuit and transistor, small size and light weight. Measurement & Analysis Instruments, Frequency: 100Hz~10KHz, Working Temperature: -10C ~ 55C, Ambient Noise Permitted:100Db.[LED INDICATE]Ultrasonic detector has LED light indicate the strength of signal of the active channel, user-friendly and unsurpassed, Battery powered and easy to use.[IT CAN' DETECT WATER LEAKAGE IN YOUR HOME PIPE]The Leak Detector, due to the household pipe is generally a low voltage system, the ultrasonic is unable to detect water leakage.The Automotive Stethoscope Model EM410 , the pick-up sound loudness can be controlled by adjusting its volume control.Adjustable pick-up loudness control.Headset combined with ear padding to cut out background noises.Strong probe body, black ABS molding.Colour:blackMaterial:plasticPackage Contents:1 x Stethoscope unit1 x Headphones2 x probeOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.