... Real-time Recording, support USB, PTZ, network, two-way audio, VGA, HDMI;2. Support mobile phone live preview ... 16bit ADPCMAudio InputRCA*4Audio OutputRCA , 1 channel Two-way AudioSupportStorage&backupHDD Port2 SATA ports, Support up to ... 0 PortsPTZPTZ Control Support Preset, Patrol, PatternAlarmVideoMotion detection, Video loss detection, Temper detectionIO input/output4CH Input, 2CH outputalarm ...