https://www.dahuasecurity.com/products/video-intercoms
Product Info
CAM-411B1

CAM-411B1

SHENZHEN YUXIN TECHNOLOGIES CO., LTD
Region: China
Update: 07/30/2007
Key Specifications
3.7mm pinhole lens 420TVL__?23 x 62(L)mm

1/4"Sharp CCD,420tvl/1Lux

https://www.asmag.com/project/the_manpower_survey/