Dahua HAC-B1A21P-U-IL-A 2MP Smart Dual Light HDCVI Bullet CC Camera is a professional-grade Full HD 1080P analog bullet surveillance camera designed to provide clear, reliable, and intelligent security monitoring for homes, offices, retail stores, schools, warehouses, parking areas, restaurants, banks, factories, and commercial buildings. Combining 2 Megapixel Full HD image quality, Smart Dual Light technology, built-in microphone, and IP67 weatherproof protection, this camera delivers excellent performance both day and night while remaining simple to install and highly compatible with existing analog CCTV systems.

Unlike ordinary analog cameras that only record black-and-white video at night, the Dahua Smart Dual Light system intelligently combines infrared LEDs and warm white LEDs. During normal nighttime monitoring, the camera operates in infrared mode, providing discreet black-and-white images. When a person or vehicle enters the monitored area, the camera automatically activates its warm white LEDs and switches to full-color night vision, making it much easier to identify faces, clothing colors, vehicles, and other important details. After the object leaves, the camera automatically returns to infrared mode, reducing unnecessary light pollution and saving energy.

The camera features a 2MP Progressive Scan CMOS image sensor capable of recording at 1920 × 1080 Full HD resolution, producing sharp images with natural colors and excellent detail. It is available with either a 2.8 mm or 3.6 mm fixed-focal lens, allowing users to choose between a wider viewing angle or longer observation distance depending on installation requirements.

One of the major advantages of this model is its built-in microphone, enabling synchronized video and audio recording over HDCVI technology. This makes the camera ideal for monitoring entrances, reception areas, offices, retail stores, and other locations where audio evidence is valuable.

Supporting HDCVI, AHD, TVI, and CVBS video formats, the camera works with a wide variety of DVRs and can easily upgrade older analog CCTV installations without replacing existing coaxial cable infrastructure. The IP67-rated weatherproof housing also allows reliable operation in harsh outdoor environments, including heavy rain, dust, humidity, and high temperatures.

Whether you are searching for Dahua HAC-B1A21P-U-IL-A, Dahua 2MP Bullet Camera, Smart Dual Light CCTV Camera, Full HD Analog Security Camera, Bullet CC Camera, Built-in Mic CCTV Camera, Outdoor Bullet Camera, HDCVI Security Camera, or Dahua CCTV Camera Bangladesh, this model offers an excellent balance of image quality, intelligent lighting, durability, and affordability.

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Product Description & Specification

Crystal Clear Full HD 1080P Surveillance

The Dahua HAC-B1A21P-U-IL-A records video at 1920 × 1080 Full HD resolution, delivering sharp and detailed footage suitable for both residential and commercial surveillance.

The 2 Megapixel Progressive Scan CMOS Sensor captures clear images while maintaining smooth video performance throughout the day.

This level of resolution helps users clearly identify:

• Faces
• Clothing
• Vehicles
• License plates (within practical distance)
• Suspicious activity
• Customer movements
• Staff activity
• Visitors entering or leaving a property

Compared with older 720P analog cameras, the Full HD resolution provides noticeably better clarity and detail, making recorded footage more useful during investigations.

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Smart Dual Light Technology

One of the most advanced features of this camera is Dahua's Smart Dual Light technology.

Unlike conventional CCTV cameras that only use infrared LEDs at night, this camera combines infrared illumination with warm white LEDs to deliver more intelligent nighttime surveillance.

Intelligent Operation

Normal Night Monitoring

• Infrared LEDs remain ON.
• The camera records black-and-white video.
• No visible light disturbs nearby residents.
• Low power consumption.

Motion Detected

When the camera detects movement:

• Warm white LEDs automatically switch ON.
• The camera immediately changes to full-color recording.
• Faces become easier to recognize.
• Vehicle colors become visible.
• Clothing colors are accurately recorded.
• Important evidence becomes clearer.

After Motion Ends

Once movement disappears:

• Warm light turns OFF.
• Infrared mode resumes automatically.
• The camera continues silent monitoring.

This intelligent lighting system provides the perfect balance between privacy, energy efficiency, and image quality.

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Excellent Night Vision Performance

The Dahua HAC-B1A21P-U-IL-A delivers dependable surveillance even in complete darkness.

Infrared Night Vision

• Maximum IR distance: 30 meters

Infrared mode is ideal for:

• Residential compounds
• Garages
• Building entrances
• Warehouses
• Office exteriors
• Parking areas

Warm Light Distance

• Maximum warm light distance: 20 meters

When activated, the warm LEDs provide colorful nighttime images, helping identify people and objects more accurately than standard infrared-only cameras.

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Built-in High-Quality Microphone

Unlike many entry-level analog CCTV cameras, this model includes a built-in microphone.

The microphone records synchronized audio together with video over HDCVI technology.

Benefits include:

• Better incident investigation
• Audio evidence
• Customer service monitoring
• Employee communication review
• Entrance monitoring
• Reception desk surveillance

This feature makes the camera especially suitable for:

• Retail stores
• Offices
• Schools
• Reception areas
• Restaurants
• Pharmacies
• Banks
• Small businesses

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High-Quality Fixed Lens

The camera is available with:

• 2.8 mm fixed lens
• 3.6 mm fixed lens

2.8 mm Lens

Offers a wide viewing angle suitable for:

• Shop entrances
• Living rooms
• Parking areas
• Reception desks
• Corridors
• Offices

3.6 mm Lens

Provides a narrower viewing angle for monitoring objects at greater distances.

Users can choose the lens that best suits their installation requirements.

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Smart Image Enhancement Technologies

To improve image quality under different lighting conditions, the camera includes several intelligent processing technologies.

Digital Wide Dynamic Range (DWDR)

DWDR improves visibility in scenes containing both bright and dark areas.

Ideal for:

• Building entrances
• Glass doors
• Windows
• Reception areas

2D Digital Noise Reduction (2D DNR)

Noise reduction technology helps remove image grain under low-light conditions.

Benefits include:

• Cleaner images
• Better recording quality
• Reduced video noise
• Improved storage efficiency

Automatic White Balance (AWB)

Automatically adjusts colors according to surrounding light.

The result:

• Natural-looking images
• Accurate color reproduction
• Better daytime performance

Automatic Gain Control (AGC)

AGC automatically adjusts brightness when lighting conditions change.

This ensures stable image quality throughout the day and night.

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Multi-Format Video Output

The Dahua HAC-B1A21P-U-IL-A supports multiple analog video standards.

Supported formats include:

• HDCVI
• AHD
• TVI
• CVBS

Users can easily switch between formats depending on the DVR being used.

This makes the camera highly compatible with both new and existing surveillance systems, reducing upgrade costs.

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HDCVI Technology

The camera uses Dahua's High Definition Composite Video Interface (HDCVI) technology.

Advantages include:

• Long-distance HD transmission
• Low signal loss
• Real-time video
• Audio transmission
• Easy installation
• Reuse of existing coaxial cable
• Lower installation costs

HDCVI is an excellent solution for upgrading older CCTV systems without replacing all wiring.

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IP67 Weatherproof Protection

The camera is designed for outdoor installation and harsh environments.

Its IP67 weatherproof rating protects it from:

• Heavy rain
• Dust
• Humidity
• Wind
• Heat
• Cold weather

Suitable installation locations include:

• House entrances
• Parking lots
• Building perimeters
• Factory gates
• Warehouses
• Outdoor corridors
• Shops
• Schools

The rugged housing ensures long-term reliability under various environmental conditions.

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Flexible Installation

The bullet-style housing supports:

• Wall mounting
• Ceiling mounting
• Pole mounting (with suitable accessories)

The adjustable mounting bracket allows installers to position the camera for the best viewing angle, making it suitable for both indoor and outdoor security projects.

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Technical Specifications