"AudioTech Probe Professional-Quality Electronic Stethoscope, Model# AT201"
"Accurately pinpoint trouble spots anywhere theres movement of mechanical parts: noisy valves and lifters, worn or broken gears, clogged fuel injectors, bad bearings, air leaks and more. AudioTech Probe amplifies the sounds of trouble so the trouble can be found, diagnosed and quickly fixed. Ideal for professionals and DIYers, and great for appliances and other household repairs. Thousands of uses, including boat, RV, motorcycle, heavy equipment, plumbing repair, air conditioning servicing, anything with a noisy problem to fix. Lightweight and easy to use7in. stainless steel probe180#176; swivel boom to reach tight spotsStereo headphones with 3ft. cord that plugs into the amplifierVolume controlWind baffleOperates on AAA batteries (included)Model AT201"