K-Line's AT3635 Ultrasonic Leak Detector Kit highlights a hand-held diagnostic detector that identifies and pinpoints leaks in weather seals, shorts and arcing in electrical systems, as well as pressure and vacuum leaks in the following systems: coolant, air conditioning, vacuum, tire, rim, pneumatic air, fuel and EVAP emissions, exhaust, hydraulic and steering. Because ultrasonic frequencies are directional, according to the company, the source of an ultrasound is easy to locate. Simply point the detector at the scanning area or where you suspect a leak. Then, use the audible or visual signals to track the leak source. The kit includes a headset, an acoustic extension cone and a high-impact plastic storage case.