High Strength Wall Microphone Voice Listen Detecotor for Engineer Water Leakage Oil Leaking Hearing

Product Features:  Works on wooden walls, doors, windows, steel plates, etc.Highly Sensitive, carefully adjust audio slowly, as not to cause discomfort to your ear-budsThis audio gadget works by amplifying the vibrations of audio. When people are talking in a room their voices are simply a waveband, and depending on how loud they are talking, the waveband travels short and long distances which are picked up and amplified by this device.colour:Black + SilverMaterial:metal   Package Contents:1* Detecotor1* USB Cable1* Circular probe1* Needle probe1* Headphone1 * use Manual   FAQA: ODM/OEM ServicesQ1: May I buy samples from you?A: Sure, sample order is available for you to test our quality and service.Q2: What's the leading time?A: 2~5 days for sample orders ,bulk order according to the different product .Q3: Do you have any MOQ limit ?A: Our minimum order qty is 20pcs each model ,but we accept small order as trail order .Q4: can I get your price list ?A: Yes, pls tell us the model number and order quantity ,then we will offer you the price by email.Q5: How will you deliver the goods to me?A:We usually ship the products by express delivery to your door or by air freight to your nearest airport. If the order quantity is large, we may ship by sea container.Q6: How to proceed the order if I have logo to print?A: First, artwork for visual confirmation, and next is sample picture or sending sample to you for confirmation, finally we will go to mass production.Q7: Can i do my owe design package box ?A: yes. pls upply the artwork, and then we can print the box with your own design.Q8: Do you have any After-Sales service?A: Yes! We have professional After-sales Dept. For mega project, our technical person can also provide the in-door installation.  /* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1