cctv H.264 4CH Stand Alone Net DVR security system. Doble Sony 1/3" ... Pack Time15/30/45/60mins selectableHDD InterfaceSupport SATA HDD & USB diskNetwork InterfaceeRJ45, 10M/100MNetwork ProtocolSupport TCP/IP, UDP, ... fast rewind, frame by frameBackupBackup AVI file via USB flash disk, USB disk, USB CD/DVD-RW & NetworkPTZ ControlBuilt-in RS485, ... (LEDs on cctv H.264 4CH Stand Alone Net DVR security system