Cameras were difficult to connect and found out after research that they cannot connect to a 5G wireless connection?? I purchased these cameras for security because we will be having people in our home when we are not there. The camera function is good but the YI cloud is pretty bad. You cannot view stored videos on your PC only phone or tablet?? App functions "most" of the time but today I had an alert there was motion on one of the cameras and no one should be home. Took me 12 minutes to view the camera on the app?? Kept trying to load?? Restarted my iPhone and could not connect. Tried on my new Ipad and same issue but after several minutes I could see an image. Would not purchase again for security but would purchase as a single camera if its not important.