... USB, 4CH Digital Video Recorder Real-time Recording H.264 Network DVR FeaturesWith H.264 High efficiency Video CompressionSupport 4CH playback ... total 100fps support 4 D1@25fpsWith a LED display, show the time, network, alarm, display, power and so on state.Support Symbian ... 2 USB2.0 slot, support USB, mouse, backup, burning, upgradeStrong Network server, support IE review and CMS(can manager over 500 ...