DH-HAC-B1A21P-U is a compact 2MP HDCVI fixed-focal bullet camera built for people who want dependable, budget-friendly outdoor surveillance with minimal wiring changes. Made by Dahua, this camera belongs to the Cooper Series and is well suited for homes, small businesses, and basic surveillance setups that already use coaxial cabling.
At the core of DH-HAC-B1A21P-U is its 2MP resolution, capturing 1920 x 1080 pixel footage through a 1/2.7″ CMOS sensor at up to 30fps@1080P. This ensures faces and important details stay clear across everyday monitoring situations, whether at a home entrance or a small storefront.
Format flexibility is a major strength of DH-HAC-B1A21P-U. The camera supports switchable HD and SD output, along with CVI, CVBS, AHD, and TVI compatibility, giving installers genuine freedom to pair it with a wide range of existing DVR systems without needing to overhaul the whole setup.
Night monitoring is handled through Smart IR technology, with a maximum IR length of 20 meters and auto or manual IR on/off control. This ensures the camera adjusts its infrared output automatically, keeping footage detailed and well-exposed rather than washed out at close range.
HDCVI technology is where DH-HAC-B1A21P-U genuinely simplifies installation. It supports four signals over a single coaxial cable simultaneously, including video, audio, data, and power, along with long-distance transmission capability that makes it well suited for properties with cameras mounted farther from the recorder.
Durability is central to this camera’s design. With an IP67 weatherproof rating and a working temperature range of -40°C to +60°C, DH-HAC-B1A21P-U performs reliably through rain, dust, heat, and extreme cold without any drop in image quality.
Image quality features round out the experience. DH-HAC-B1A21P-U includes BLC, HLC, and DWDR processing to balance challenging lighting conditions, along with 2D noise reduction and auto or manual white balance for consistent, well-exposed footage.
Lens options add further flexibility. DH-HAC-B1A21P-U is available with a 3.6mm fixed lens as standard, with 2.8mm and 6mm alternatives, giving installers the ability to match the field of view to the specific monitoring area.
Whether securing a home entrance or a small storefront, DH-HAC-B1A21P-U delivers dependable 2MP HDCVI clarity, flexible multi-format compatibility, and genuine outdoor durability in one compact bullet camera.
Full technical specifications are listed below.
DH-HAC-B1A21P-U VIDEO OUTPUT
| Feature | Specification |
| Video Output | CVI/TVI/AHD/CVBS video output choices via 1 BNC port |
DH-HAC-B1A21P-U POWER SPECIFICATIONS
| Feature | Specification |
| Power Supply | 12 VDC ± 30% |
| Power Consumption | Max 2.8 W (12 VDC, IR on) |
DH-HAC-B1A21P-U ENVIRONMENT & PROTECTION
| Feature | Specification |
| Operating Temperature | –40 °C to +60 °C (–40 °F to +140 °F) |
| Operating Humidity | <95% (RH), non-condensing |
| Storage Temperature | –40 °C to +60 °C (–40 °F to +140 °F) |
| Storage Humidity | <95% (RH), non-condensing |
| Ingress Protection | IP67 |
| Anti-corrosion Level | Basic Protection |
DH-HAC-B1A21P-U PHYSICAL & STRUCTURE SPECIFICATIONS
| Feature | Specification |
| Casing Material | Plastic |
| Product Dimensions | 146.1 mm × 70.0 mm × 69.8 mm (5.75″ × 2.76″ × 2.75″) |
| Net Weight | 0.15 kg (0.33 lb) |
| Gross Weight | 0.23 kg (0.51 lb) |
| Installation Options | Wall mount; ceiling mount; vertical pole mount |
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