Demo site       SP2500/2800/3800 High Resolution, Very Low Light Camera, Day and Night Changeover Camera Speed Dome with SONY HAD CCD 680,000 pixels (NTSC)/ 800,000 pixels (PAL) Modular Camera Fast Zoom Lens with Intelligent Programmable tour via RS-485 Auto Function have IRIS/FOCUS/WHITE BALANCE/BACKLIGHT OSD Function 6 Group Sequence of Preset Positions MPEG-4 codec. the pride and joy of LDR series. Outstanding Quality of Recording and Transmitting Visual Images Astonishing Image Compression (1.5Kb on average) Entirely Different Stability of Image Perfect Synchronous Replay of Image and Sound (avi file) Application of Diverse Networks and High-speed Transmission