... UDP, IP, HTTP, DHCP, PPPoE, UPnP etcSD storageSD CardSupport SD card local storage(optional)SoftwareWeb BrowserMicrosoft Internet Explorer 6.0 ... H)x508(V)Horizontal resolution540TVLMin. illumination0.3LUXFocal lengthPan-focus lens;4x optical zoom, f=3.7~14.8mmS/N Ratio50dBElectronic shutter1 ... .0Vp-p at 75ohmScanning frequency15.625KHz(H) 50HzZoom4x optical zoom H.264 Mini. outdoor speed dome IP camera