This mini eavesdropping device is a great spy audio system, just looks like a real USB flash disk, and you can put the audio bug with any USB port of computer, then this USB flash disk starts to record the sound around the audio bug.

Specification
 Mini Flash Disk Eavesdropping Device with 4GB Memory, Spy Audio
 Voice recording on/off switch
 USB 2.0/1.1 supported
 No external power required
 4GB Memory included
 USB flash disk function
 Sensitive Range: 0-10m
 Operation temperature range: -10 ~ +50 degree C
 Operation humidity: 15  85% RH
 In retail packaging