... choice;n Easy backup by using USB port / network;n Local / network playback modes for choice;n 16ch simultaneous playback/rewind ... Pagedown, Pageup, Next file, Previous file, Next camera, Previous camera, RepeatBackup ModeFlash Drive/USB/Network downloadNetwork FunctionsFully ONVIF compliant,TCP/IP, UDP, DHCP ... aebell.com Thanks. BL-DVR300-16C-F1 Entry Level DVR300 Series 16 Channels Network DVR NVR