Overview: This mini eavesdropping device is a great spy audio system, just looks like a real USB (Universal Serial Bus) flash disk, & you can put the audio bug with any USB (Universal Serial Bus) port of computer, then this USB (Universal Serial Bus) 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 COperation humidity: 15 85% RHIn retail packaging Weight Approx:20g Size Approx:8.5 x 3.2 x 1.6