˙BL-620CB/680CB day/night dual-optical-filter auto switch; ˙Adopt 1/3 CCD high-sensitivity image sensor; ˙Adopt the world's most advanced AEBELL DSP digital signal processing technology; ˙ Powerful anti-interference function, stable image display effect; ˙Auto control function for environmental change; ˙High quality, high resolution and low power consumption; ˙Auto sensing IR LED can achieve 24-hour monitoring.