... , more than 10 Specification: ModelSY-HD007FOperation System Embedded Linux Operation System System Resources 4 channel recording, playback and network ... ,Timing ,Alarm,Motion de-tection Search Mode By time,event,channel,log Backup Mode Network download ,USB ... support smartphone remote monitor,viewing, recording etc.ProtocolTCP/IP,RTMP,RTSP/RTP,NTP, FTP,NFS,UPNP,SMTP, ... 4/8/16 channel h.264 real time dvr