4CH digital video input,4CH 720P recording      
adopt standard H.264 compression     
1CH simulation BNC/VGA video output 
1CH audio input&output, support audio intercom     
VGA supports 1280*1024 
support many DDNS(oray,3322,dyndns)  
support mouse high speed PTZ function,convenient to PTZ controlling 
support alarm, network, PTZ, mobile phone monitering (Win CE/Symbian / iPhone/Blackberry/Android) 
support 2 SATA HDD,max capacity 1T,support U disk,DVD recorder,network,mobile HDD backup   
embedded WEB Server,convenient to controlling management on the wall