... manual, ensure the ir high fully ratel Integrating camera, the conch, metal mask, the camera, ir lamp in one bodyl ... 3 inches SONY CCD, provide a low illumination circumstance clear imagesl 48 decibels, high-quality signal-to ... ir projection distance is 40 metersl Within the synchronization,l In appearance, environment, good adaptability specifications / modelLX-Z391CRT ColourBlack and white color ...