... ,support Mobile,Iphone,3G phone,two way audio,motion detection alarm,free software 64ch. support ... quality, Two-way audio monitoring.>1,4,9,16,25,36,64 multiple video display optional in one ... Audioprocessordouble directs voice Monitor(Built-out MIC)Audio gainauto audio gain control(AGC)NightvisionnightvisionΦ5 10 LED ... 9,16,25,36 or 64 multiple video display optional in one screen, support record, alarm, ...