The VIVOTEK CU9171-H is a 4 megapixel (4MP) indoor modular camera sensor with a 3.7mm pinhole lens, primarily designed for covert surveillance. It is not a standalone camera but works in conjunction with the VIVOTEK VC9101 Video Core System (sold separately). 

The CU9171-H has a discreet design. The cylinder-shaped sensor unit and pinhole lens, coupled with a 5-meter (16.4 ft) cable to connect to the video core, allow for flexible and unobtrusive installation in tight spaces or areas where aesthetics are important. This makes it ideal for locations like ATMs, banks, stores, and offices.

• 4 Megapixel 
• 1/2.7" CMOS Sensor 
• 2688 x 1520 Max Resolution 
• 30 Frames Per Second 
• Fixed Focus Pinhole Lens 
• 3.7mm Focal Length 
• F2.5 Aperture 
• ONVIF G S T 
• Field of View (FoV): Horizontal: 93°, Vertical: 48° & Diagonal: 117° 
• 0.045 lux at F2.5 (Color) Min Illumination 
• WDR Pro 
• Dimensions Ø 24 x 30 mm 
• Weight 19g 
• -10°C ~ 50°C Operating Temperature 
• Powered via the VC9101 
• Smart VCA 
• Trend Micro IoT Security 
• Chrome Browser Support 

In essence, the VIVOTEK CU9171-H is a highly compact and capable camera sensor unit designed for covert indoor surveillance, leveraging the processing power and features of the VIVOTEK VC9101 Video Core System to provide high-quality video with advanced analytics and security features.