Feature: 1. Easy to Operate: The sound amplifier comes with a probe that is easily attachable to various pipe materials, floors, and walls through the headphones that the naked ear would not usually detect. 2. Practical: The microphone amplifier is equipped with a charging hole, headphone port, and a switch knob that provides accurate measurements, eusure sensitivity and sound quality. 3. Pipe Leakage Monitor: The microphone is useful for side leakage of pipes, underfloor heating detection, and water detection, compatible with various pipe materials, floors, walls, and more. 4. High Clarity: An excellent sound detector with crystal clear audio, it can be used in any environment, even in indoor or building settings, built in 200mAh li battery, long standby time. 5. Versatile Compatibility: The ear listening amplifier can be used with a wide range of materials, including concrete walls, steel walls, wooden walls, iron walls, glass walls, hollow bricks, various pipes. Specification: Item Type: Sound Amplifier Material: ABS Current Consumption: 10mA Battery: 200mAh li battery (included) Operating Temperature: -20°C-50°C Application: Suitable for cement walls, steel walls, wood walls, iron walls, glass walls, hollow bricks, etc., as well as various pipe materials, floor slabs, walls, etc. Monitoring Mode: Can be connected to headphones and external speakers. Package List: 1 x Sound Amplifier1 x USB Charging Cable1 x Earphone