TP-9367L Marksman II Ultrasonic Diagnostic Tool Features advanced heterodyne circuitry and Sound Signature Technology to convert and amplify inaudible ultrasonic sounds into audible natural sounds. Provides quick diagnosis of leaks and defects before they become major breakdowns! The Marksman II is ideal for detecting air brake leaks, compressed air leaks, vacuum leaks, tire leaks, gear and bearing wear, electrical discharge, exhaust leaks, refrigerant leaks, cabin seal and gasket integrityand more! Comes complete with ultrasonic receiver, ultrasonic emitter, air probe, contact probe, headphones and rugged carrying case. Pinpoint air break leaks, gear and bearing wear in wheel hubs, transmissions, transfer cases, differentials, compressed air, vacuum, electric motors and other pressurized leaks quickly and effortlessly5-LED signal-intensity indicator and audible alarm easily pinpoint the exact problem sourceLaser pointer to help pinpoint the source of pressurized leaksInternal Noise Control (INC) ensures tool is unaffected by ambient noise. Ideal for use in extremely noisy environments.Self-adjusting Automatic Gain Control (AGC) circuitry enhances sensitivity and simplifies operation.Adjustable touch-control sensitivity pad and power switch.Checks for electrical discharge associated with insulation breakdown, carbon tracking and arcingUnique ultrasonic emitter helps locate faulty seals, gaskets and weatherstripping in passenger cabs, trailers and other non-pressurized enclosures