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 use 7in. stainless steel probe 180#176; swivel boom to reach tight spots Stereo headphones with 3ft. cord that plugs into the amplifier Volume control Wind baffle Operates on AAA batteries (included) Model AT201