This client allows users to view and control their DVR. We have a pro version and have no ad. Let some dvrs work continue just like port is 7050. Support more new type dvrs. Because these new type dvrs default port is 37777 or 34567 or 8000 or 5800 or 8101. And some old dvr port maybe is them too. The app mistakenly believes that the old dvr is a new type device.