Features:
It can pick up and amplify weak audio signals through a sensitive piezoelectric sensor, and observe the normal/abnormal signal and discern its location
Designed for helping locate the source of excess bearing and mechanical generated noises
It can quickly locate the source of engine noise such as piston slap, worn gears and bearings, damaged valves, water pump failure, blown gaskets

Specifications:
Model: MS-120
Frequency range: 10 to 10KHz
Input impedance: >20M
Ambient noise permitted: 100dB
Working temperature: -10 to 60 Centigrade
Power supply: 4*AAA battery (not included)
Dimension: 156*67*28mm
SKU: X1IN10344

Package includes:
1 * MS-120 Stethoscope
1 * Magnetic base
1 * Earphone
2 * Sensor
2 * Probe pin
1 * Operational manual