Features 1、Zinc Alloy: Made of premium zinc alloy, the water leakage detector is sturdy, durable, reliable, rustproof and has a long service life. 2、4 Gears: The zinc alloy water leakage detector has 4 gears, automatic noise reduction, can be used for pipe leakage, floor heating detection, geophysical exploration water. 3、Accurate: The water leakage detector has exquisite craftsmanship, powerful performance, clear sound quality, strong sensitivity, suitable for all kinds of pipe, ground and wall, etc. 4、Working Principle: The working principle of the water leakage detector is to rely on the seismic wave of the physical sound source to transmit sound, sound gradually amplified, to the ear can be heard normally. 5、Effect: The larger the leakage point of the detection pipe, the greater the water pressure, the better the effect. The 4 gears pipe leakage detector has a function port is for recording. Specifications Item Type: Water Leakage Detector Material: Zinc Alloy Weight: Approx. 1403g/3.09lb Color: As Shown Size: Approx. 11x6.5x2.5cm/4.33x2.56x0.98in Battery: 9V 800mah 6F22 Nimh Battery (Delivered with Built In Battery) Working Time: 10-23 Hours (Depending on Sound Strong and Weak) 4 Sound Options: 3 Gear(100Hz-700Hz), 2 Gear(700Hz-900Hz), 1 Gear(900Hz-1100Hz), 0 Gear(1100Hz-1600Hz) Probe Sensitivity: -60db Maximum Audio Magnification: 25000x Uses: Precise detection instruments, with automatic noise reduction function, high definition listeners, can be used for pipeline leakage testing, floor heating detection, water detection, and application of various pipeline materials and grounds, wall, etc. Package List 1 x Water Leakage Detector 1 x Inductive Head 1 x Earphone 1 x Aluminum Storage Box 1 x Use Manual