1.4ch1080P IP Camera input 2.Linux ,dual core 3.E-SATA External HDD recording ... system, dual core DSP Ø Support 4ch 720P IP Camera video input Ø H.264 compression, 4ch 720P real-time decodeØ 4ch 720P ... portsPTZPTZ Control 1 RS485AlarmVideoMotion detection, Video loss detectionI/O 4channel input,4channel outputNetwork Linkage AlarmRecording, Buzzer, PTZ control, EmailNetworkIE Remote Preview1 ...