Efreecity Mini CCTV 300&deg;/s High speed 700TVL Zoom x10 Outdoor Day/Night PTZ Dome Camera Sony 1/3" CCD Sony Effio-E chipset 10x optical Zoom High Resolution 700TVL IR array LED Night Vision 50 meters Using sophisticated motor, smooth operation, sensitive reaction Adopts long distance RS-485 transmission mode RS-485Bus