Digital Watchdog DWC-VSDG04Bi vs Digital Watchdog DWC-VSDG04Mi: Specification Comparison
Both the DWC-VSDG04Bi and DWC-VSDG04Mi are Digital Watchdog 4MP outdoor vandal dome IP cameras sharing the same sensor class, housing type, and environmental ratings. The comparison centers on lens architecture — fixed versus motorized varifocal — and the downstream differences that choice drives in IR range, physical size, power draw, and deployment flexibility. Installers cross-shopping these two are typically deciding between a cost-effective fixed-angle unit and a remotely adjustable zoom camera for the same dome form factor.
In This Guide
How do the imaging specs compare?
Both cameras share the same 4MP 1/3" CMOS sensor producing a 2560×1440 pixel image, identical minimum scene illumination of 0.0 lux in B/W and 0.005 lux in color, True WDR at 120dB, Smart DNR 3D noise reduction, and a maximum stream rate of 30fps across all supported resolutions. Day/night switching, auto gain control, shutter speeds from 1/30 to 1/100,000, and de-fog are present on both models. The imaging pipeline — H.264/H.265/MJPEG compression, dual-stream CBR/VBR at 64Kbps–8Mbps — is also identical.
The key imaging differentiator is the lens. The DWC-VSDG04Bi carries a fixed 2.8mm lens delivering a 94° horizontal field of view — useful for wide-area coverage of lobbies, parking entries, or corridor endpoints where the angle is predetermined. The DWC-VSDG04Mi uses a motorized varifocal 2.8–12mm lens with autofocus, providing an adjustable HFOV of 92° down to 31°, enabling on-site or remote zoom without physically repositioning the camera. The motorized zoom also supports a longer IR illumination range: the DWC-VSDG04Mi reaches 164 feet (approximately 50m) versus the DWC-VSDG04Bi's 100 feet (approximately 30m), a 64% increase relevant to large open areas, long corridors, or perimeter fence lines.
What about installation and environment?
Both cameras carry IP67 ingress protection and IK10 vandal resistance in aluminum die-cast vandal dome housings, and both are rated for the same operating temperature range of -22°F to 140°F (-30°C to 60°C) at 0–95% RH non-condensing. Either unit is suitable for exposed outdoor installations subject to weather, dust, and physical tampering.
Physical size and power consumption diverge due to the motorized lens assembly in the DWC-VSDG04Mi. The fixed-lens DWC-VSDG04Bi measures 4.59" H × 3.54" W (116.6×90mm) and weighs 1.43 lbs (0.65kg), drawing a maximum of 4.5W via DC12V or PoE (PoE Class 2). The DWC-VSDG04Mi is larger at 5.55" H × 3.93" W (141×100mm) and heavier at 1.98 lbs (0.9kg), drawing up to 7.5W via DC12V or PoE. Installers should verify that the PoE switch port budget can sustain 7.5W for the Mi model; a Class 2 port rated at 6.49W will be insufficient — a Class 3 port (up to 15.4W) is appropriate. Mounting accessories are optional and sold separately for both models.
Which fits your VMS and analytics better?
Both cameras support ONVIF conformant CMS and DW Spectrum IPVMS natively, and both implement the same protocol stack: 802.1x, DDNS, DHCP, FTP, HTTP/HTTPS, ICMP, IGMP, NTP, ONVIF, PPPoE, QoS, RTCP, RTP, RTSP, SMTP, SNMP, UDP, and UPnP. Network security features are identical — digest authentication with ID/PW, IP filtering, and MAC filtering. IPv4/IPv6 dual-stack and 10/100 LAN are standard on both. The web viewer requires Microsoft Edge on Windows OS for both units.
Edge analytics — Line Crossing, Perimeter Intrusion, and Tampering Detection — are present on both cameras based on the provided specifications. The DWC-VSDG04Mi spec sheet additionally lists LPR (License Plate Recognition) as an analytics tag, which is absent from the DWC-VSDG04Bi's provided specifications; buyers with LPR requirements should confirm this capability directly with Digital Watchdog documentation before specifying either model. Audio support is identical on both: G.711A/U compression, one audio input, one audio output, and a built-in microphone. Edge storage is also equal: Micro SD/SDHC/SDXC up to 1TB. Both carry a 5-year warranty. Operational notifications via email and FTP server and 8 programmable privacy masks are shared features.
Which should you choose: the DWC-VSDG04Bi or the DWC-VSDG04Mi?
Our take: The DWC-VSDG04Bi is the stronger choice when the coverage angle is fixed at installation and minimizing PoE power budget is a priority. The DWC-VSDG04Mi is the stronger choice when installers need post-installation zoom adjustment or must cover distances beyond 100 feet. Three concrete spec deltas drive the decision: (1) IR range — 164ft on the Mi versus 100ft on the Bi, a 64% extension; (2) lens adjustability — the Mi's motorized 2.8–12mm varifocal (92°–31° HFOV) versus the Bi's fixed 2.8mm at 94°; and (3) maximum power draw — 7.5W (Mi) versus 4.5W (Bi), which may require a PoE Class 3 port for the Mi. Both deliver identical 4MP image quality, IP67/IK10 environmental ratings, and analytics parity for the three documented analytics. Specify the Bi for high-density deployments on budget-constrained PoE infrastructure; specify the Mi for perimeter and long-range scenes where lens tuning after installation adds operational value.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Digital Watchdog DWC-VSDG04Bi | Digital Watchdog DWC-VSDG04Mi |
|---|---|---|
| Resolution | 4MP (2560×1440) | 4MP (2560×1440) |
| Image Sensor | 4MP 1/3" CMOS | 4MP 1/3" CMOS |
| Lens Type | Fixed | Motorized Varifocal |
| Focal Length | 2.8mm | 2.8mm – 12mm |
| Horizontal FOV | 94° | 92° – 31° |
| Min. Illumination (Color / B&W) | 0.005 lux / 0.0 lux | 0.005 lux / 0.0 lux |
| IR Range | 100 ft (Smart IR) | 164 ft (Smart IR) |
| Wide Dynamic Range | True WDR 120dB | True WDR 120dB |
| Video Compression | H.264, H.265, MJPEG | H.264, H.265, MJPEG |
| Max Frame Rate | 30fps at all resolutions | 30fps at all resolutions |
| IP Rating | IP67 | IP67 |
| Vandal / Impact Rating | IK10 | IK10 |
| Operating Temperature | -22°F to 140°F (-30°C to 60°C) | -22°F to 140°F (-30°C to 60°C) |
| Power (Max) / PoE Class | 4.5W / Class 2 | 7.5W / Not specified (Class 3 port required) |
| Edge Storage | MicroSD/SDHC/SDXC up to 1TB | MicroSD/SDHC/SDXC up to 1TB |
| Audio | 1 in / 1 out / built-in mic, G.711A/U | 1 in / 1 out / built-in mic, G.711A/U |
| Analytics | Line Crossing, Perimeter Intrusion, Tampering Detection | Line Crossing, Perimeter Intrusion, Tampering Detection, LPR (per tag) |
| Dimensions (H × W) | 4.59" × 3.54" (116.6 × 90mm) | 5.55" × 3.93" (141 × 100mm) |
| Weight | 1.43 lbs (0.65kg) | 1.98 lbs (0.9kg) |
| Warranty | 5 Year | 5 Year |
Frequently Asked Questions
Which should you choose: the DWC-VSDG04Bi or the DWC-VSDG04Mi?
The DWC-VSDG04Bi is the stronger choice when the coverage angle is fixed at installation and minimizing PoE power budget is a priority. The DWC-VSDG04Mi is the stronger choice when installers need post-installation zoom adjustment or must cover distances beyond 100 feet. Three concrete spec deltas drive the decision: (1) IR range — 164ft on the Mi versus 100ft on the Bi, a 64% extension; (2) lens adjustability — the Mi's motorized 2.8–12mm varifocal (92°–31° HFOV) versus the Bi's fixed 2.8mm at 94°; and (3) maximum power draw — 7.5W (Mi) versus 4.5W (Bi), which may require a PoE Class 3 port for the Mi. Both deliver identical 4MP image quality, IP67/IK10 environmental ratings, and analytics parity for the three documented analytics. Specify the Bi for high-density deployments on budget-constrained PoE infrastructure; specify the Mi for perimeter and long-range scenes where lens tuning after installation adds operational value.
Is the DWC-VSDG04Bi or DWC-VSDG04Mi better for low-light performance?
Both cameras are spec-identical in low-light performance based on the provided specifications: 0.005 lux minimum illumination in color mode and 0.0 lux in B/W mode, both using Smart IR illumination and 120dB True WDR. The DWC-VSDG04Mi does reach 164 feet with its IR versus 100 feet for the DWC-VSDG04Bi, so for longer-range low-light coverage the Mi has an advantage in IR throw distance, but the sensitivity floor is the same on both.
Can I use either camera on a standard PoE switch without upgrading ports?
The DWC-VSDG04Bi draws a maximum of 4.5W and is rated PoE Class 2 (which supports up to 6.49W at the port), so it is compatible with standard 802.3af Class 2 PoE ports. The DWC-VSDG04Mi draws a maximum of 7.5W; this exceeds Class 2 delivery and requires a Class 3 port (802.3af, up to 15.4W) or better. Verify your switch port class before deploying the Mi model.
Do both cameras work with non-DW Spectrum VMS platforms?
Yes. Both the DWC-VSDG04Bi and DWC-VSDG04Mi are ONVIF conformant and are specified to work with any ONVIF-compliant CMS in addition to DW Spectrum IPVMS. Both also support the full RTSP/RTP/RTCP protocol stack, which enables integration with most third-party VMS platforms that use ONVIF or direct RTSP stream ingestion.
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