This USB flash drive has a hidden microphone built inside to record conversations discreetly. No one would suspect that such a common piece of technology is actually being used as a hidden microphone to capture everyhthing that's going on in a room. This is the perfect surveillance tool for any and all school and office applications. And besides that, it has many other practical funcitoins: record lecture notes, important conversatoins, big meetings, etc, and play them all back later for research. The USB Flash Drive Audio Recorder is easy to use and plugs into any computer for perpeptual energy. This small portable device makes taking notes much easier in any business or school application.