... control scheme 4.Big lens aperture, special manual 5.High quality Quick Details Place of Origin: Shenzhen China (Mainland)Brand ... , provide a low illumination circumstance clear imagesl 48 decibels, high-quality signal-to-noise ratio (S/N)l Minimum illumination, ... alloy size60×80mmEnvironmental conditionsOperate temperature :-20~+50°C High quality IR 40m Metal Conch CCTV Systems Camera