ADVANCED TECHNOLOGY: State-of-the-art, non-invasive leak detector that detects both pressure and vacuum leaks of ANY GAS. “Hear” leaks in the ultrasonic range, and distinguish them from mechanical or other background ultrasound. Effective in gas-saturated areas and in noisy or windy conditions. ADJUSTABLE SENSITIVITY: Quickly identify leaks from a distance, and then zero in on the exact location of the leak. New, 20%-improved sensitivity helps you detect smaller leaks and faults faster than ever before. OVER-RANGE AUDIO ALARM: Signals you to adjust the range sensitivity for optimum performance. Helps you keep your eyes on what you are measuring rather than on your instrument. PEAK HOLD DISPLAY: Find leaks and faults faster and more efficiently. Get the job done quicker and easier RUGGED CONSTRUCTION & LONG BATTERY LIFE: Internal components have been redesigned to improve shock resistance and reliability. Up to 200 hours of operation on a single standard 9-Volt battery. IN THE BOX: The VPE-PRO-PLUS Professional Kit includes: VPE Leak Detector, Battery, Touch Probe, Waveguide, Noise Blocking Headphones, AccuTrak VPESG2 Burst Tone Ultrasonic Sound Generator, Large Carry Case, User Manual and Canvas Belt Pack. Superior AccuTrak VPE PRO-PLUS Ultrasonic Leak Detector Pro-Plus Kit, Includes VPE Leak Detector, Headset, Battery, Large Carry Case, Touch Probe, Waveguide, Sound Generator, Noise Blocking Headphones