... authority, user authorityDDNS (free)Free DDNS boundedSuperiorityP2p technology, mobile viewCenter management software (free)1,4,9,16,25,36 or 64 multiple ... screen, support record, alarm, remote playback on records and other management functions.CertificationCertificationISO, CCC, FCC, CEOtherShapeCeiling hemisphereUse environmentIndoor usePowerDC 5V 2ATemperature ...