Compression: MPEG 4 / H.264 Video Input: 16 channel per card. able 32 channels at most Video System: PAL/NTSC Video Output: VGA display and TV out Resolution: CIF (352x288), QCIF (176x144) Audio Input: 1 channel wiht sound card Based on advanced real-time compression technology, V8 series DVR cards integrate multiple functions into one system, such as digital recording, alarm detection,electronic map and intelligent searching for recorded files, etc.