Feature: 1. Application: Underground water pipe leak monitor is widely suitable for site construction, car maintenance and various construction pipelines with strong practicability. 2. Included Earphones: Water pipe leakage monitor comes with high definition sound quality large earphones, the sound details are clearer, and every detail is not ignored. 3. Dual Probe Design: Water leakage monitor is equipped with two kinds of probes, and can be switched according to actual conditions. The sound volume can be adjusted for more accurate results. 4. Built in Battery: Superior water leakage detection kit is supplied with built in 3.7V battery and power adapter, can be recharged and used repeatedly, has a long service life. 5. Sturdy Materials: Underground water pipe leakage tester is made from superior ABS and metal materials, wear resistant and sturdy, not easy to damage or break. Specification: Item Type: Water Pipe Leakage Monitor Material: ABS, Metal Uses: Suitable for site construction, automobile maintenance, etc. Current Consumption: 15mA Use Battery: Built in 500mAh lithium battery 3.7V Battery Type: None Probe Sensitivity: -70D db Maximum Audio Magnification: 20000X Penetration: Water pipe, cement pipe, steel pipe Answering Method: Headphones, can be connected to 16 ohm speaker (NOT included). Package List: 1 x Leak Tester1 x Probe 11 x Probe 21 x Headphone1 x Charging Cable1 x Power Adapter1 x Manual Note: Please charge according to the voltage used, using other voltages may cause fire and product damage!