Easily detects any gas that generates ultrasonic sound during flow, including vacuum leaks Capable of detecting leaks equivalent to 1.5 oz/year of refrigerant Visual output - 10 element bar graph Audio output - 0 Hz to 4 kHz natural sound conversion Adjustable sensitivity AccuTrak VPE-GN Pro Plus Kit Adjustable sensitivityPeak hold displayOver range audio alarmNot affected by wind or high concentrations of leaked gas or refrigerant Ultrasonic Leak Detector with Gooseneck The AccuTrak VPE-GN Pro-Plus Kit is the most comprehensive VPE-GN Kit, for the serious technician who needs the maximum capability from an ultrasonic instrument with a GooseNeck. The VPE-GN Pro-Plus Kit includes upgraded professional Noise Cancelling Headphones, a convenient Belt Pack, PLUS the powerful Burst Tone Sound Generator, in the larger case to keep everything together. The VPE-GN Pro-Plus Kit offers unrivaled functionality and versatility for a fraction of the cost of any competitive system with similar performance. Find any kind of leak, in any environment, find bad gaskets and door seals - and do it all well, in hard-to-reach places you can’t even see! If you do a variety of work, and need a cost-effective professional kit that can do it all, the Superior AccuTrak VPE-GN Pro-Plus Kit is for you.The Patented Superior AccuTrak VPE-GN 'Gooseneck' is a state-of-the-art non-invasive leak detector that can detect both pressure and vacuum leaks of ANY GAS. The AccuTrak VPE-GN is ideal for pinpointing leaks in air conditioning, refrigeration, automotive and other systems. The new 9½' flexible Gooseneck provides better detection capabilities in hard-to-reach places. AccuTrak is extremely sensitive to the ultrasonic sound of a turbulent gas leak. Using the latest 'heterodyning' technology it translates the sound to a lower frequency which your ear can interpret. The VPE-GN maintains the original sound characteristics making it possible to distinguish leaks from other competing background sounds. AccuTrak is so sensitive you can actually hear the blink of an eye, yet most background noise will not interfere with detection accuracy. Like all Superior AccuTrak instruments, the VPE-GN easily detects leaks of ANY gas or refrigerant, compressed air, and even vacuum leaks.