4 Channel USB 2.0 PC DVR Digital Video Recorder Adapter Vista compatible For CCTV Camera/ DVD player Home Security Baby guard H71 4 Channel USB 2.0 PC DVR Digital Video Recorder System 4Ch Video 1CH Audio CCTV Digital Recorder Surveilance Adapter Support schedule recording mode, recycling recording method available MPEG4 video compression format, Support multi-channel playback Ideal design for home/office/shop guard or baby care purpose