... real-time playback, multi-channel multi-user network operation, USB back up.DisplayOperation interface16 bit real color GUI interface support mouse ... time playback synchronously Video searchTime,date,event,channel searchStorage and back upSpace occupationVideo: CIF 4~5G/day*channel, D1 16~20G ... controllerYesPower12V/4ADimension370(Length) x 285(Width) x 72(Height) multi-functional standalone DVR