Features: 1) Supports more cards: 3 max. 2) Supports more areas, more sensitive motion detection 3) Supports all kinds of PTZ, high speed dome, and can add protocol for customers 4) Supports 16 channel alarm input, eight channel alarm output (optional) and linkage alarm recording 5) Frame rate: a) PAL: 1-25 fps b) NTSC: 1-30 fps 6) Recording output format: audio and video compression, audio or video compression 7) Supports static picture capture 8) Administration: powerful user administration and detailed log 9) Both software and hardware crash prevention 10) Flexible video display, can shield video channels to protect user privacy 11) Easy playback 12) Designed for low power consumption 13) Software upgrades provided for free