---
title: "WD12 Mini Dual-SD MDVR"
model: "WD12"
category: "MDVR systems"
url: "https://dashcamforcars.com/product/wd12-mini-dual-sd-card-mobile-dvr/"
updated: "2026-10-01"
---

# WD12 Mini Dual-SD MDVR (WD12)

The WD12 is a compact 4G mobile DVR that records four 1080p cameras in H.264 or H.265 to two SD cards, up to 512 GB. It supports ADAS and DMS, with BSD as an option, has GPS and BeiDou, Wi-Fi, JT/T 808, JT/T 1078 and GB/T 28181 support, and runs on 9–36 V at under 12 W.

- Category: MDVR systems
- Video: 1080p
- Cameras: 4 × 1080p
- Connectivity: 4G, Wi-Fi, GPS
- AI functions: ADAS, DMS; optional: BSD
- Used in: School buses, Buses, Trucking, Last-mile delivery
- Pricing: by quote, depends on volume
- Product sheet (PDF): https://dashcamforcars.com/product/wd12-mini-dual-sd-card-mobile-dvr/datasheet.pdf
- Source: specifications checked against our product specifications, 2026-10-01

## Highlights

- **Four 1080p channels**: Road, driver, doors and rear on one recorder of 120 × 120 × 46 mm.
- **Open protocols**: JT/T 808, JT/T 1078 and GB/T 28181 for third-party platforms, as well as Traqcare.
- **About 66 hours on 512 GB**: Four 1080p cameras at standard quality on two SD cards; about twice that in H.265.
- **Low power, wide input**: 9–36 V input with protection circuits and under 12 W of power draw.

## Specifications

### Video

| Spec | Value |
|---|---|
| Cameras | 4 × 1080p |
| Codec | H.264 / H.265 |
| Video standard | PAL / NTSC |
| Quality levels | 1–8 |
| Output | CVBS; VGA on request |

### AI safety

| Spec | Value |
|---|---|
| ADAS | Forward collision (FCW), lane departure (LDW) |
| DMS | Fatigue, distraction, smoking |
| BSD (optional) | Blind-spot detection |
| 360° view | WD12-B version |
| Accelerometer | 3-axis |

### Connectivity

| Spec | Value |
|---|---|
| Network | 4G LTE (TDD/FDD), Wi-Fi 802.11 b/g/n |
| Positioning | GPS / BeiDou, external module |
| Protocols | JT/T 808 (2011 and 2019), JT/T 905.2, JT/T 1076, JT/T 1078, GB/T 28181 |

### Storage

| Spec | Value |
|---|---|
| Memory cards | Two SD cards, up to 512 GB; files are encrypted on the card |
| Recording | Automatic, ignition-triggered and alarm recording; delayed shutdown |
| Updates | SD card, USB drive or remote (FTP) |

### Power & build

| Spec | Value |
|---|---|
| Input voltage | 9–36 V; overload, under-voltage, short-circuit and reverse-polarity protection |
| Power output | 12 V and 5 V, 1 A each |
| Power draw | < 12 W, without cameras |
| Battery monitor | Alert when the supply falls below a level you set |
| Operating temperature | -20 °C to +70 °C |
| Housing | Aluminium alloy, 120 × 120 × 46 mm, 450 g |
| Operating system | Linux |
| Security | Locked SD and SIM cover; user and administrator passwords |

### Interfaces

| Spec | Value |
|---|---|
| Alarm inputs | 4 × switch, 1 × emergency |
| Alarm output | 1 × switch |
| Serial | RS232 and RS485 |

The WD12 fits four-camera recording, AI safety and 4G into an aluminium housing of 120 × 120 × 46 mm and 450 g. For comparison, the WD10 measures 161 × 159 × 63 mm and weighs 1.1 kg. The WD12 runs Linux, records four 1080p inputs in H.264 or H.265, and stores footage on two SD cards, up to 512 GB.

## What the WD12 does

- **Records four views.** Four 1080p cameras use about 7.2 GB an hour at standard quality, so 512 GB holds roughly 66 hours, and about twice that in H.265. Eight quality levels trade detail against retention.
- **Runs AI safety.** ADAS gives forward-collision and lane-departure warnings. DMS detects fatigue, distraction and smoking. BSD is an option, and the WD12-B version adds a 360° view.
- **Reports to other platforms.** JT/T 808 in its 2011 and 2019 editions, JT/T 1076, JT/T 1078 and GB/T 28181 are supported, with JT/T 905 for taxis, so the WD12 can report to a third-party platform as well as to Traqcare.
- **Protects recordings.** The SD and SIM cards sit behind a lock, and files on the card are encrypted, so they cannot be played if the card is removed. User and administrator passwords control access.
- **Watches the vehicle battery.** The recorder monitors the supply voltage and raises an alert when it falls below the level you set.

## Installation

- 9–36 V input with overload, under-voltage, short-circuit and reverse-polarity protection. Outputs of 12 V and 5 V at 1 A power the cameras.
- Four switch inputs, one emergency input and one switch output are provided, with RS232 and RS485 serial ports.
- A CVBS output drives an in-cab monitor. VGA output is available on request.
- Mount the recorder in a ventilated, protected place. We recommend professional installation.

For a hard disk or eight cameras, see the [WD10](/product/wd10-mdvr/). For passenger counting on SD cards, see the [WD11](/product/wd11-mdvr/).

## FAQ

### How long does the WD12 keep footage?

Four 1080p cameras at standard quality use about 7.2 GB an hour, so 512 GB of SD storage holds roughly 66 hours before the oldest footage is overwritten. H.265 roughly doubles that.

### Can the WD12 connect to a third-party platform?

Yes, if the platform uses JT/T 808 (2011 or 2019 edition) with JT/T 1078 for video, or GB/T 28181. The WD12 also works with the Traqcare app and web platform.

### Which AI functions does the WD12 have?

ADAS (forward-collision and lane-departure warnings) and DMS (fatigue, distraction and smoking). BSD is an option, and the WD12-B version adds a 360° view.

### What power does the WD12 need?

9–36 V vehicle power. It draws under 12 W, has overload, under-voltage, short-circuit and reverse-polarity protection, and raises an alert when the vehicle battery voltage falls below the level you set.