Welcome to our store!</br>1、High Quality Material: Ear amplifier is made of high quality ABS material, high strength, wear resistant, sturdy and durable. 2、High Sensitivity: Audio listening wiretap device has high sensitivity, clear audio, and you can use the earphone to improve audio quality. 3、Complete Function: With charging hole, earphone hole and upward switch knob. Humanized design, more practical and convenient. 4、Easy Operation: Sound amplifier can be used anywhere, even indoors or in buildings, and has a built‑in lithium battery, easy to operate and carry. 5、Application: Audio ear listening device can be used for pipeline side leakage, floor heating detection, water body exploration. <p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: Audio Listening Wiretap Device Material: ABS Battery: 3.7V lithium battery 150mah (built-in battery) USB Charging: 5V <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Audio Listening Wiretap Device1 x Earphone 1 x USB Cable (Customer Satisfaction) - is our priority. If you notice any problems with the products after receiving the goods, such as damaged goods or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sale service.</br>