✦ Excellent technician's aid designed to detect and locate sources of abnormal noise.
✦ Allows technician to quickly find and analyze the source
　of a problem in engines of other moving parts.
✦ Sound is transmitted and amplified through a sensitive diaphragm.
✦ Use to pinpoint worn or defective bearing; locate cylinders with
　engine knocks; and determine if any fuel injectors are hung-upor inoperative.
✦ Includes a 12" probe extension.