4CH CCTV mini USB DVR real time Support win7,VISTA,XP input:4ch ... 4CH CCTV mini USB DVR real time Feature: 4 channels video input in one card, the maximum display/recording ... . 4 screen display and recording at the same time.Multi alarm triggering method: sensor, motion, video loss ... -channel playback, searching by time/date and recording events, images can be zoom/capture/save/print/backup. Support ...