... test before delivery 4)Warranty:2Y 15”LCD all-in-one Standalone DVR Adopts the standard Main profile H. ... supports 4ch recording,Network transmission, and playback simultaneouslySupport dual-stream transmission for all channelsSupport Multiplex operation: live, record, playback, ... DDNS,NTP,UPNP IE Browser Support Client Software Support Dual Stream Support(Main and secondary interchange) Group play ...