Connect the specified DVR, IPC, NVR and others. More Functions: Real-time preview (intercom, monitoring, playback, PTZ control, etc.) Modify device (modify device name, user name, password) Device settings (password management, time setting, device information) Cloud events (alarm recording file storage) Photo album Local login ,register login,change Password,forget password User management (modify user password. Delete or log out) About (App version information display