digital video recorder dvr -H.264,4chs video ... Features1)H.264 main profile compression algorithm ideal for standalone DVR2)4 channels Realtime full D1 recording, ... web server,multi-DVR client &SMS Networking access for remote live viewing,recording,playback,setting,system statu, ... client, standalone client and SDK11).With the sound system for the protection circuit, unique triple watchdog function, very ...