High Strength Wall Microphone Voice Listen Detector for Engineer Oil Hearing Pipe Water Leakage Leaking Listens Sound Tester ToolsFeature:1. Precise measurement2. Easy to carry3. Economical4. Partition wall listeningSpecification:Material: Plastic + electronic componentsSize: 61x35mm/2.4x1.38inCurrent consumption: 10mAUse battery: 9V batteryWorking temperature: -20°-50°Penetration: Cement wall, steel wall, wooden wall, iron wall, glass, cavity brickMonitoring method: Earphone, Can be an external speakerNote:This detector is a simple family version, and the sensitivity cannot be compared with expensive products. It can only be tested briefly, and those with higher requirements should be cautiously purchased. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 X Host1 X Headphone1 X Data Cable1 X Probe