CompatibilitysDVR Viewer works with the following DVRs:H, R, SDVR – Series The app is guaranteed on Android v2.2 or later.sDVR Viewer lets you remotely monitor and control your video security system over a Wi-Fi or 3G connection directly from your Android device. It includes following functions.- View up to 16 cameras at one location.- Monitor multiple locations from one app. – View in portrait or landscape mode.- Max. 4 channels can be selected to display split screen.- Single or split screen display. (To change from split screen to full screen, just tap the display twice. Single tapping the display again returns to split screen.)