Taking ongoing market into consideration, we are presenting a large collection of Ultrasonic Leak Detector. The offered product comes with the FLEX.US unit, carrying case, and manual and utilizes two AA alkaline batteries (included). This is a complete kit - the high-quality flexible sensor is mounted on the end of a flexible steel pipe so the ultrasonic sound can access hard to reach areas. The unit converts the ultrasonic noise of a leak into sound humans can hear (hissing sound) and not just some beeping sound or LED display that may not distinguish a leak sound from another phenomenon. The headset has excellent noise attenuation for use in the noisiest of environments.