With unique digital zoom function, the video image can be magnified; 3.5 inch high resolution lcd screen, 480 x rgb x 320(hvga) resolution, 64k colors. Lcd screen brightness/ contrast/color saturation/backlight brightness is adjustable. Video format ntsc, pal automatically adapt and standard prompt. Video signal strength measurement, to test if video signal level is attenuate Powerful in testing lan cable Ptz(p/l & zoom) control Audio input 8g internal memory Video screen shot and recording.