Dahua HAC-B1A21P-U-IL-A — Smart Dual Light Bullet Camera with Audio. Intelligent Night Vision.

The Dahua HAC-B1A21P-U-IL-A is a 2MP full-HD HDCVI bullet camera from Dahua’s reliable Cooper Series, featuring Smart Dual Light technology and a built-in microphone. It’s designed for 24/7 outdoor surveillance where both image quality and audio evidence matter — covering entry gates, driveways, shop fronts, warehouses, and parking areas.

💡 Smart Dual Light — Intelligent IR + White Light Switching

The Smart Dual Light system combines infrared (IR) illumination for standard night vision with warm white LED illumination for full-color imaging. When the Perimeter Protection or SMD Plus function of a compatible AI XVR detects a human or vehicle target in the monitored zone, the camera automatically activates the white LED — delivering full-color footage for definitive target identification. When the target leaves, the camera automatically switches back to IR — reducing light pollution, lowering power consumption, and extending LED lifespan. On cameras without AI XVR integration, modes can be set manually: always-IR, always-white, or auto.

🎙️ Audio Over Coaxial — Built-In Microphone

The built-in microphone captures audio alongside video, transmitted over the same coaxial cable using HDCVI technology. Dahua’s unique audio processing restores source audio and eliminates noise, ensuring high-quality audio evidence. Audio recording requires a compatible HDCVI DVR/XVR with audio input support. A valuable supplementary evidence layer for security incidents.

📡 HDCVI Technology — Long-Distance Transmission Without Quality Loss

Dahua’s proprietary High Definition Composite Video Interface (HDCVI) transmits full-HD video, audio, data, and power over a single coaxial cable — up to 700 meters for HD video and 300 meters via UTP cable. Unlike IP cameras that require Cat5/6 cabling and network infrastructure, HDCVI cameras work directly with existing coaxial cable runs — making them the ideal upgrade path for existing analog systems or new installations where network infrastructure is unavailable.

🔌 Multi-Format Compatibility — CVI / CVBS / AHD / TVI

The camera supports four video output formats — HDCVI, CVBS (analog), AHD, and TVI — switchable via the OSD menu or a UTC controller. This makes it compatible with virtually every DVR and XVR system in the market: Dahua, Hikvision, and third-party recorders. No proprietary lock-in. No compatibility guesswork.

🛡️ IP67 Weather Protection — Built for Bangladesh’s Climate

IP67 rated — fully dustproof and waterproof up to 1 metre submersion for 30 minutes. Survives monsoon rains, humidity, construction dust, and extreme heat without degradation. Operating temperature range: -40°C to +60°C. Built to run continuously in outdoor installations year-round.

⚡ Advanced Signal Quality

Signal-to-noise ratio greater than 65dB — ensuring clean, clear video with minimal interference even over long cable runs. 2D/3D Digital Noise Reduction (DNR) reduces image grain in low-light without sacrificing detail or sharpness. BLC (Back Light Compensation) and WDR (Wide Dynamic Range) ensure balanced exposure in high-contrast scenes.

Specifications