A hidden USB pen drive spy voice recorder is very useful when you need to discreetly record any conversation either at a moment’s notice or planned in advance. These devices are designed to be extremely unassuming and practical, usually disguised as a variety of everyday objects. Packed with a concealed microphone, a voice-activated spy recorder simply starts recording whenever sound is detected. If there's someone speaking, it immediately terminates its standby mode and it tapes what's being said. This voice recorder features simple one-key recording and longtime recording, need no software to install. Not only does it make audio recordings, but it also works as a regular usb flash drive. A functional voice recorder that provides great convenience in class-recording, conference-recording as well as note-recording. When it is fully charged, it offers a long play recording mode continuously. Support tf card, up to 8gb. This digital voice recorder supports windows 2000/xp/vista/win7,8,10/windows me. Windows 98se/windows 98.Mac os 9 and higher.