This is a HD 4in1 PTZ camera! It’s time to update your old fashion PTZ camera among CVBS, AHD, TVI, CVI. You don’t need to change your Digital Video Recorder AND rewiring! Cause signal transfer is selectable among AHD/CVI/TVI/CVBS, But the premise is that you must make sure your DVR is 4 in 1 DVR. ...