dunglass 0 Posted September 24, 2016 Why does my DVR have an internal metal contained mains operated SMPSU when many others have a small plasitic encased also mains operated 12v ( external ) SMPSU . Share this post Link to post Share on other sites
tomcctv 190 Posted September 24, 2016 Why does my DVR have an internal metal contained mains operated SMPSU when many others have a small plasitic encased also mains operated 12v ( external ) SMPSU . It's just the way some are made It's just like some have operator buttons on front panel some dont Share this post Link to post Share on other sites
