Mini Sport Diving DVR(hidden camera) record video and audio synchronously, USB drive, web camera Mini Sport Diving DVR( ... hidden camera)Main function: record video and audio synchronously, USB drive, web cameraVideo format: AVI,640*480, ... Product Size: 103*57*28mm Player: Storm, KMplayer, Mplayer and others For various sport activities to use: bicycling, skiing, climbingOperation ...