The SID-45C/46C series of indoor mini domes are the right choice in applications that call for performance and discreetness at an economical price. The SID-45C/46C employs the W-IIIDSP chip, which offers a Day & Night function to achieve good low light level performance and higher than 530TV lines of image quality for both day and night conditions. In addition, there are built-in functions including the convenient OSD menu, 4 zone privacy masking and motion detection. The SID-45C/46C redefines what you should expect from a low cost mini dome. The SID-45C has a 3.7mm auto iris lens and the SID-46C has an 8mm auto iris lens.