Dahua IPC-HUM4431S1-L4-AS-0280B – 4MP Pinhole IP Camera, 2.8 mm, PoE, Two-way Audio

The Dahua IPC-HUM4431S1-L4-AS-0280B is a 4-megapixel pinhole network camera from the Special Series, designed for covert indoor video surveillance. Its compact metal housing and miniature form factor allow seamless integration into ceilings or walls without attracting attention. The camera combines high resolution, Smart H.265+ compression and two-way audio, making it an outstanding choice for demanding B2B projects such as hotels, offices and retail environments.

Key features

• Sensor: 1/2.7" progressive CMOS, 4 MP effective pixels
• Max. resolution: 2688 × 1520 (4 MP) @ up to 20 fps; 2560 × 1440 (3.6 MP) @ up to 25/30 fps
• Supported resolutions: 4M, 3.6M, 3M, 1080p, 1.3M, 720p, D1, VGA, CIF
• Lens: fixed focal, 2.8 mm, M12 mount; FoV H: 100°, V: 57°, D: 114°; aperture F2.0; close focus distance 0.8 m
• Video compression: Smart H.265+, H.265, Smart H.264+, H.264, H.264B, MJPEG (sub-stream only)
• Bit rate: CBR/VBR; H.264 and H.265: 3–6144 kbps
• Min. illumination: 0.01 lux @ F2.0 (colour); 0.001 lux @ F2.0 (B/W)
• WDR: 120 dB; BLC, HLC, 3D NR, digital watermarking
• White balance: auto, natural, street lamp, outdoor, manual, regional custom
• Audio: 1 audio in / 1 audio out; built-in microphone; two-way communication; G.711a, G.711Mu, PCM, G.726
• Alarm I/O: 2 inputs / 1 output
• Storage: MicroSD card slot – up to 256 GB
• Smart functions (IVS): intrusion detection, tripwire; motion detection (4 areas), audio detection, illegal access, video tampering
• Network: 10/100 Base-T, RJ-45; IPv4/IPv6; ONVIF (profile S/G/T); HTTP, TCP, UDP, RTP, RTSP, RTMP, SMTP, FTP, SFTP, DHCP, DNS, DDNS, QoS, UPnP, NTP, Multicast, ICMP, IGMP
• Power supply: 12 V DC or PoE (802.3af); consumption: basic 1.4 W, max. 1.8 W (H.265 + IVS + WDR)
• Operating temperature: –40 °C to +60 °C; relative humidity ≤ 95 %
• Housing: metal construction; colour: black
• Certifications: CE-LVD (EN62368-1), CE-EMC (2014/30/EU)

The camera is powered via PoE (802.3af) or 12 V DC, simplifying installation without additional power cabling. Combined with Dahua NVR systems and DSS/PSIM software, it forms a reliable and discreet surveillance solution.