Feature: 1. HIGHLY SENSITIVE SENSING: Leak detector has a highly sensitive sensing, noise filtering, broaden the exploration frequency range of 200HZ?3000HZ, improve efficiency. 2. FOUR LEVELS OF ADJUSTMENT: Wall leakage listen tester with metal body, four position adjustment, test depth of 1?1.5m / 3.3?4.9ft (test depth and pipe pressure size). 3. ACCURATE POSITIONING: Water pipe leakage monitor is more accurate in positioning, the higher the value, the closer to the leak point, to capture different leaks. 4. SENSITIVITY DISPLAY: Water pipe leak detector rotates counterclockwise to decrease the display sensitivity, and clockwise to increase the display sensitivity. 5. APPLICABLE SCENARIOS: Water pipe detector is suitable for a variety of scenarios, widely used in fire fighting pipes, floor heating pipes, household pipes, car rattles, etc. Specification: Item Type: Water Pipe Leak Detector Material: Aluminum Alloy Frequency Range: 200-3000Hz Magnification: 0-100dB Adjustable Frequency Staging: 1-4 Staging 200-3000HZ Continuously Adjustable Battery Type: Built In 1600mAh Polymer Lithium Battery. Package List: 1 x Water Pipe Leak Detector3 x Probe1 x Probe Protection Cover1 x Muffler Handle Converter1 x Earphone1 x Storage Box2 x Key1 x Power Adapter1 x Instruction Manual