Pen Spy Cameras are designed for covert use and with one press recording. Pen hidden cameras are supplied with an internal rechargeable lithium type battery for a few hours of operation. This spy camera can be set to constant recording or motion detection recording but even in motion detection mode, it will still use as much battery power as constant recording. Each Pen Cam has either an internal memory capacity of 4-8GB or we supply pen cameras with a micro SD card normally up to 16GB capacity. Typically it will use about 1GB for every 30 minutes of recording. To playback recordings, simply connect the pan cam to your PC USB as software is not normally required for modern computers, download the AVI video and audio recordings to your PC desktop and playback with WMP or VLC.