The Dahua HAC-B1A21-U-0280B is a 2MP HDCVI bullet security camera from Dahua's Cooper Series, designed for reliable surveillance in residential, commercial, and outdoor security installations. It features a 2MP CMOS sensor delivering 1920 × 1080 Full HD resolution at up to 30 fps, providing clear real-time video over coaxial infrastructure.

The 2.8mm fixed-focal lens provides a wide 100° horizontal field of view, making the camera suitable for monitoring entrances, driveways, corridors, yards, and other areas where broad scene coverage is required. The camera incorporates Smart IR illumination with up to 30m range, automatically adjusting infrared intensity to help reduce overexposure when subjects move closer to the camera.

Supporting HDCVI, TVI, AHD, and CVBS video formats, the camera offers flexible integration with compatible DVR/XVR systems. Its IP67-rated housing, wide operating temperature range of -40°C to +60°C, and 12V DC power supply make it suitable for demanding outdoor surveillance applications. The camera is also compatible with the Dahua PFA134 junction box, providing a practical mounting and cable-management solution for professional installations.