Adopt USB2.0 Connector DVR Cards Series, 1 Channel Realtime,4 Channel USB DVR Box, 1/3 inch Sony Chip Camera and 1/4 Inch Sony CCD Camera, 420 TV Line, Mini Wired CCTV Video CCD Video&Audio Camera With Built-In 3.7mm Cone Pinhole Lens and Vari-Focal Lens