• H.264 & Dual-stream video compression
• Full channel@WD1(PAL:960×576,NTSC:960×480) resolution real-time recording
• Support VCA detection alarm (line crossing detection and intrusion detection)
• Support HIKVISION-C and PELCO-C Coaxitron protocols for Up to Coax function
• HDMI and VGA output at up to 1920×1080P resolution
• Support alarm push notification on mobile devices when alarm event occurs
• Up to 16-ch synchronous playback

Read more at: http://overseas.hikvision.com/en/Products_accessries_218_i5431.html