Portable Size: The small size of this tool is very convenient for everyday use, you can carry it in your tool bag without taking up too much storage space. Built-in Battery: This tool uses the rechargeable battery to supplys power, so you can recharge it in time. Water leakage detector adopts component and higher technology, which greatly improves the sound quality, giving you a better experience. Wide Application: This tool can be used to leakage detection of construction pipelines such as home water pipeline, cement pipes, steel pipes. This water leakage detector is a very essential tool for plumbing engineers. The volumes can be adjusted through the volumes knob, you can adjust the volumes according to your needs in time. This water leakage detection equipment is applicable to leakage detection of construction pipelines such as home water pipeline, cement pipes, steel pipes. This water leakage detector is a very essential tool for plumbing engineers, which is very practical. Probes sensitivity: -60Ddb Maximum audio amplification: 13000X. Penetration: water pipes/cement pipes/steel pipes. Sound input: 32 ohm earphones Power consumption: 12mA Battery:1 x lithium battery, 100mAh (included) Colour:Black Material:plastic Package Contents: 1 * Water Leakage Detector set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.