Feature: 1. Dual Probe Design: This underground water leak detector is designed with dual probes, which can be switched according to the site conditions for more accurate detection results, which is very practical. 2. Built In 100mah Lithium Battery: This underground water pipe leakage monitor uses a built in 100mah lithium battery, and power adapter, which can be recharged and reused repeatedly, with a long service life. 3. HD Sound Headphones: This water pipe leakage monitor comes with HD sound headphones, the sound details are clearer, every detail will not be overlooked, so that you can quickly determine if there is a leak or not. 4. Excellent ABS Material: This tube water leak detector is made of excellent ABS material, which is strong and abrasion resistant, not easy to be damaged and has a long service life, and it can be applied to water pipes, cement pipes, steel pipes, etc., which is practical and highly penetrating. 5. Wide Application: This water leakage detection monitor has a wide range of applications and is widely used in on site construction, automobile maintenance and various construction pipelines, which is highly practical. Specification: Item Type: Water Leak Detector Model: HY929 Material: ABS Operating Current: 10mA Battery Type: 3.7V Lithium Battery 100mah x 1 (Included) Probe Sensitivity: -70dB Maximum Sound Amplification: 20000X Penetration: Water Pipe, Cement Pipe, Steel Pipe Listening Method: Earphone, External 16Ω Speaker Recording Storage: Memory Card, maximum support 32G (Memory Card not included). Package List: 1 x Leak Detector 1 x Probe 1 x Probe Pin 1 x Headphone 1 x USB Data Cable 1 x Manual