[Easy Operation] Attach the probe to various surfaces such as pipes, walls, and floors to detect subtle sounds that are usually inaudible. This device is equipped with a user-friendly interface including a charging port, headphone jack, and an on/off knob, enhancing its usability and functionality. [Versatile Functionality] This through-wall microphone amplifier boasts high sensitivity and superior sound quality, making it ideal for applications like pipe leakage detection and floor heating checks. Its robust design ensures it works effectively on different pipeline materials and structural elements. [Broad Applications] Designed for strength and efficiency, this high-performance microphone can be used on concrete, steel, wood, iron, glass walls, and various pipe materials. It's perfect for detecting leaks and other issues in diverse environments, from residential to industrial settings. [Exceptional Audio Clarity] Experience clear and precise sound with this voice listening detector. Whether used indoors or within complex building structures, its built-in 200mAh lithium battery and compact design make it a reliable tool for professional and personal use. [Extensive Usability] Suitable for a wide range of applications, this ear listening device amplifier adapts to multiple wall types and materials. Its versatility makes it an essential tool for maintenance professionals and DIY enthusiasts alike, ensuring comprehensive coverage and detection capabilities. Color: Black Material: Plastic+Metal Package Contents: 1 x Portable Leak Detector