Easy to use accessory for leak detection in high, outside noise situations
Engineered to improve success during difficult conditions: PVC pipe, through asphalt or pavement, and water filled cavaties
Designed for "stand-up" operation
Will effectively muffle outside encompassing noise, such as; wind, construction, and vehicle traffic
Will plug into any Goldak Model 777 Leak Detector

Model NE-77 Noise Eliminator