Microphone Amplifier. This super sensitive Listening Device can pick voice signals from a distance and amplify those. One can listen from connected speaker. Can be used as hidden mic. 1.Listening Device can be used to listen someones talk by using this. Speaker wire can be extended up-to 10 meters. 2. Can be used as minor project for School Science project. 3. Low battery consumption, thus it will work non stop for many hours. It is using Cardboard/Wooden base, Paper, Electronic-Electrical Components, Mechanical & Scientific goods as per the requirement of a particular model. This is a handmade complete working model supported by rough study material to make a suitable projects report by the student.
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