1.Incorporate the best SONY Exview HAD CCD 2.Automatic switchover to day night mode at the required light level The day night mode can be adjusted in Auto or manual setting. 3.One day time , the sensitivity reach 0.05 Lux at 1/3s (slow shutter), and during the night time,the sensitivity reaches as low as 0.01 6ux 4.4 Zones of Privacy Setting 5.RS485 data signal for two way communication