Turpro EasyCAP USB 4 Channel DVR CCTV Digital Video Camera Recorder Capture Adapter USB 4 Channel DVR CCTV Digital Video Camera Recorder 4 CHANNEL USB 2.0 DVR is the safety system of ideal design for home/office/shop guard or other purpose. 4 channels video input in one card, the maximum display/recording rate is 25 fps under PAL format, and 30 fps under NTSC format. 4 screen display modes are available.