Specifications: Model:JA-3504H Compression:H.264 Video processing chipset:DSP processor Video input:4ch BNC Video output:Monitor, LCD Resolution Display:PAL704X576NTSC704X480 Resolution recording:PAL704X288352X288NTSC704X240352X240 Operation system:Linux OS Operation model:Record, replay , preview ,back-up, network System operation:Mouse, IR Controller 4ch realtime recording Frame recording :PAL100704X288100352X288 NTSC120704X240120352X240 frame rate: PAL125fpsNTSC130fps Recording Mode:continual, schedule, Motion, Alarm Recording alarm:Different channels, video delay: 30 seconds, 1-50 minutes. Alarm input:4ch input Alarm output:1ch output Playback:multi-channel synchronous playback; fast forward: X4, X8, X16; quick retreat: X4, X8, X16 Research Recording Hard Driver:All. Alarm, Motion, Time SATA port ,Support 500G hard disk Network protocol:10/100 Base-T TCP/IP,UDP,HTTP,NTP,DHCP,DDNS Network function:IE remote monitoring, remote control, remote settings, PTZ remote control, remote playback PTZ:RS485,Zoom,Control Backup;USB Power supplier:DC 12V6.7A