High Strength Wall Microphone Voice Listen Detector for Engineer Oil Hearing Pipe Water Leakage Leaking Listens Sound Tester Tools Feature: 1. Precise measurement 2. Easy to carry 3. Economical 4. Partition wall listening Specification: Material: Plastic + electronic components Size: 61x35mm/2.4x1.38in Current consumption: 10mA Use battery: 9V battery Working temperature: -20-50 Penetration: Cement wall, steel wall, wooden wall, iron wall, glass, cavity brick Monitoring method: Earphone, Can be an external speaker Note: 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 Host 1 X Headphone 1 X Data Cable 1 X Probe _x005F_x000D_