1,teaching presenter 2,High images 3,VIDEO/S-VIDEO output 4,rotatable working platfrom 5,Image freeze / NEGA ModelAV-2800TLensF=1.6 ... optical power zoom, 10 multiple digital zoomApertureAutomatic CCD camera 1/4 CCD,PLA color systemMIN illuminance1 LUXComposite video signal1.0Vp ... *2, bottom light:LEDClose dimension460mm*310mm*100mmweight3.5kg Educational teaching equipment, visual presenter,visualizer