| System | Linux |
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| RAM | 64 MB |
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| ROM | 128 MB |
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| Front Panel | Aluminum |
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| Power Supply | PoE (IEEE802.3af ) or DC 12V/2A |
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| Standby Power | 1.5 W |
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| Rated Power | 9 W |
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| Camera | 2MP, CMOS |
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| Ethernet Ports | 1 x RJ45, 10/100 Mbps adaptive |
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| Door Entry | Facial Recognition, IC card (13.56MHz ), PIN code, NFC |
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| RS485 Port | 1 |
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| Relay Out | 1 |
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| Exit Button | 1 |
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| Door Magnetic | 1 |
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| Installation | Flush mounting |
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| Application Environment | Outdoor |
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| Dimension | 380 * 158 * 55.7 ( mm) |
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| Operating Temperature | -40°C to +55°C |
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| Storage Temperature | -40°C to +70°C |
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| Operating Humidity | 10% to 90% (non-condensing) |
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| Audio Codec | G.711 |
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| Echo Cancellation | Yes |
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| DTMF | RFC2833 |
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| Microphone | Built-in microphone |
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| Speaker | Built-in speaker |
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| Video Codec | H.264 |
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| Video Resolution | 1280 x 720 |
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| Viewing angle | 100°(D) |
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| Max. Image Transfer Rate | 720p – 30fps |
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| Light Compensation | LED white light |
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| Network Protocol | ONVIF, SIP, UDP, TCP, RTP, RTSP, NTP, DNS, HTTP, DHCP, IPV4, ARP, ICMP |
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| Package Content | VEX-B21L (Power adapter not included) , Flush Mounting Box, Screwing kit, User Manual |
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| Button | Mechanical |
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| Display | 4.3” TFT LCD |
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| Resolution | 480x272 |
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