... , IR night vision 10m, H.264, 1/3 SONY CCD, 420TVL, two ... free)Built in free DDNS system, IE multi-channel view client(free)No need to install software ... via IESuper-Client1,4,9,16,25,36, 64-channel , no user limited , centralized monitor, remote record ... : 6mmAudioCompression formatG.726/G.711Inputone channel linear input /Mirophone InputOutputone channel linear outputP/T P/T controlBuilt ...