Video input 16 channels System PAL、NTSC Resolution PAL：704?76（D1）、352x288（CIF）、176x144（QCIF） NTSC：704?80（D1）、352 x240（CIF）、176 x120（QCIF） Frame rate PAL 1~25FPS/ channel adjustable and NTSC 1~30fps/ channel Compression format H.264 Code rate 100kbps～1000kbps Video output 1 channel TV out，1channel VGA output Video preview（video display Support preview all channels at same time.；support switching display in 1,4,6,9,16,20,24 screen slip Adjustment of Image quality Adjusted by Brightness/contrast /hue /saturation； input:There are the units are in 4/8/12/16/20/24 audio input for select ness ，support max 24Chs audio input Sampling rate 8KHz Compressing standard G.729 Output stream 8kbps Audio output Line Out Live monitor Can free to choose any audio channels to live monitor RS-485 One RS-485 port，for control the Pan/tile and lens， Net port One 10/100M Ethernet port， for network surveillance, maintenance, and control Alarm input/output :24swithes for input and 6switches for output，support local alert, and network linkage alert. Key-press:Front panel system ，humanness professional design, simple operation. System stability:Software and hardware with Watch-dog function protect the system hanging up. The system will auto-restart when it shut off. Flowing frame rate:PAL 1~25FPS/ channel adjustable and NTSC 1~30fps/ channel adjustable Each channel parameter can be set up Recording type Recorded by Manual , motion detect, timing , alert,（the frame can be adjusted from 1fps to 25fps when record ） The length of recording 60MB－200MB/hour/channel（based on 352x288 ,25fps