Single Button Recording. Record video file by AV IN, with the quality up to VGA 30fpcs. Record audio file by AV IN or MIC IN with MP3 file format. Can play AVI of MPEG4 file format directly. Can play MP3 and WAV audio file. Can play all multimedia file formats by the attachment convert program. Set password, for every file you record so as no one else can view these files without your permission. This function is great for micro-surveillance. Support SD card up to 2GB. Record video with real time and date stamping. USB OTG, USB2.0.