High Quality Material: The ear amplifier is made of high-quality ABS material, offering high strength, wear resistance, sturdiness, and durability.<br> High Sensitivity: This audio listening device features high sensitivity and delivers clear sound output. An included earphone helps enhance audio quality.<br> Complete Functionality: Designed with a charging port, earphone jack, and an upward switch knob. The user-friendly design makes it practical and convenient to use.<br> Easy Operation: The sound amplifier can be used in various indoor and outdoor environments. It features a built-in lithium battery, making it easy to operate and carry.<br> Application: This audio ear listening device is suitable for pipeline leak detection, floor heating inspection, and water body exploration.<br> Item Type: Audio Listening Device<br> Material: ABS<br> Battery: 3.7V 150mAh lithium battery (built-in)<br> USB Charging: 5V<br> Package Includes:<br> 1 x Audio Listening Device<br> 1 x Earphone<br> 1 x USB Cable<br> Customer satisfaction is our priority. If you encounter any issues with the product upon arrival, such as damage or incorrect quantity, please promptly. We are committed to providing reliable after-sale support.