... ,DNS,DDNS,DHCP,FTP,NTP,PPPOE,SMTP,UPNP;Support bothway voice talkback and monitoring;Heater and radiator function, make the product ... ≥50db(AGC OFF,Weight On)Electronic shutter1/50—1/10000secInterface Voice talkback output1 channel,MIC port(optional)Audio output1channel,linear output ...