<p> <b>Feature:</b><br> 1. It can be used for pipeline side leakage / floor heating detection / physical exploration for water, suitable for various pipeline materials and ground, wall, etc.<br> 2. High-sensitivity metal probe with earphones makes it more sensitive and sound-qualified.<br> 3. Compact and complete function, with charging hole, earphone hole and upside switch knob.<br> 4. Easy to operate, it can get the sound out from the wooden/brick wall, window, door or armor plate.<br> 5. It has a built-in lithium battery, easy to operate and carry.<br> <br> <b>Specification:</b><br> Condition: 100% Brand New<br> Item Type: Ear Listening Device<br> Material: ABS<br> Color: As Pictures Shown<br> Built-in Battery Capacity: 200MAH<br> Size: Approx. 42 x 37mm / 1.7 x 1.5in (Length x Diameter)<br> <br> <b>Package List:</b><br> 1 x Ear Listening Device<br> 1 x Earphone<br> 1 x USB Cable<br> 1 x Manual<br> <br> <b>Note:</b><br> The probe must contact the tube surface steadily. Please do not move the main unit in parallel during the contact to avoid damage to the instrument. </p>