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 on table or any place, thanks to its 4GB memory built-in, so you may just switch on it, then this USB flash disk style audio bug starts to record the sound around it, its rechargeable Li-ion battery supports to take audio record up to 15 hours after full charged, and the audio bug will get fresh power after you charge it through USB port of any computer.
Specification
Mini USB Flash Disk Eavesdropping Device, 4GB Memory Built-in, Spy Audio
Voice recording on/off switch
USB 2.0/1.1 supported
No external power required
4GB memory card built-in
USB flash disk function
Sensitive Range: 0-10m
Powered by internal Li-ion battery
Battery working time: up to 15 hours
Audio file format: WAV
Audio file recording rate: 128K bps
Supporting Audio recording time: 4GB about 70 hours