... , professional counter surveillance systemFeatures:*4CH, H.264 compression, VGA, Support SATA HardDisk, Mouse, USBX2 network, Audio,RS485, IE browse,10 languages ... /frame adjustable;*Support RS485 PTZ controll*Support more than one SATA hard disk 1500G*Built-in 3322,Edvrddns,dyndns,myq-see ... x 220mm, about 2.2 KGs. 4ch H.264 Easy to use network standalone dvr