Decoding VIOFO's Letters: W, WW, T, TW, TC and S Explained
You go looking for a VIOFO and end up staring at names like A329SW 3CH, T340TW 4CH and A229 Pro Tele 3CH. They look random, but they are not. Once you know what each letter and suffix stands for, you can read a VIOFO model name and know which cameras are in the box before you open the spec sheet.
This is a reference page, not a buying guide. If you want help choosing, head to which VIOFO dash cam to buy in Australia. You can see every current model in our range of VIOFO dash cams in Australia.
The quick decoder
| You see | It means | Examples from VIOFO's range |
|---|---|---|
| 1CH, 2CH, 3CH, 4CH | The number of cameras recording. 1CH is front only. | A329S 1CH, T340 4CH |
| Duo | Two cameras, usually front and rear. It is VIOFO's older naming, still used on some models and many retailer listings. | A129 Pro Duo, A149 Pro Duo |
| W | The rear camera is Waterproof and designed to mount outside the vehicle. | A329SW, A229 Pro-W, T330W |
| WW | Two Waterproof exterior cameras. | A329WW, T330WW, T340WW |
| T (after the model number) | Adds a Telephoto camera, a zoom lens for reading plates further ahead. | A329T, T330T |
| TW | Telephoto camera plus a Waterproof rear camera. | A329TW, T330TW, T340TW |
| TC | Telephoto camera plus a Cabin camera, with no rear camera. | A329TC |
| IR | An Infrared Cabin camera takes the place of the rear camera. | A329S 2CH IR |
| Tele | The telephoto version of an A229 Pro. | A229 Pro Tele 2CH, A229 Pro Tele 3CH |
| S | The updated A329 generation. Compared with the original A329, VIOFO's spec sheets add Hybrid Parking Recording and Low Power Impact Detection. | A329S |
| Plus, Pro, Ultra | Tiers within the A229 range: Plus is 2K front and rear, Pro steps the front up to 4K, Ultra records 4K at both ends. | A229 Plus, A229 Pro, A229 Ultra |
| Mini, M | Compact, front-only bodies. | A119 Mini 2, A119M Pro |
| V3 | Version three of a model. | A119 V3 |
The trap: T330 is not a telephoto camera
This one catches almost everyone. A T at the start of the name is the series. The T330 and T340 are VIOFO's barrel-shaped, screenless T-series, the successors to the T130, and a plain T330 2CH is simply a front and rear camera.
A T after the model number means telephoto. So an A329T has a zoom camera, and a T330T has both: T-series body, plus a telephoto camera. Our T330 and T340 guide covers the whole series.
What does the S in A329S actually add?
The original A329 is now marked discontinued on VIOFO's store. Comparing the two spec sheets, the A329 lists three parking modes (auto event detection, time-lapse and low bitrate recording), while the A329S lists five, adding Hybrid Parking Recording and Low Power Impact Detection. Those two modes are what make the A329S so frugal when parked, provided it is paired with the HK6 hardwire kit. More in our A329S review.
What does Duo mean on an A229?
Two different things, which is why the name confuses people. There was an original VIOFO A229 Duo model, and many retailers also use Duo as shorthand for the two-channel A229 Plus and A229 Pro. The original A229 Duo is discontinued, so if you are shopping today, the two-channel model to look at is the VIOFO A229 Plus 2CH.
Worked examples
Here is the decoder applied to three real names, checked against VIOFO's own descriptions.
A329SW 3CH
A329S (the updated A329) + W (waterproof rear) + 3CH (three cameras). VIOFO lists it as 4K front, 2K infrared cabin and 2K waterproof rear. The third camera is the cabin one, because W already accounts for the rear.
T340TW 4CH
T340 (T-series with a built-in cabin camera) + T (telephoto) + W (waterproof rear) + 4CH. VIOFO describes it as a 4K front camera with an IR cabin camera, a telephoto camera and a waterproof rear camera.
A229 Pro Tele 3CH
A229 Pro (4K front) + Tele (telephoto) + 3CH. VIOFO lists it as 4K front, a 2K telephoto camera with 4x optical zoom, and a 1080p rear camera.
Is there a pattern to the numbers?
Loosely. Within a family, a higher number is generally the newer model: the A149 Pro Duo replaces the A129 Pro Duo, and the A329 series sits above the A229 range. It is not a strict rule across VIOFO's whole lineup, so treat it as a hint rather than a spec. The MT1 is VIOFO's motorcycle camera and sits outside these patterns.
You will also see -G on some Australian retailer listings, for example "A119 Mini 2-G". It marks the version sold with GPS, so check what is included rather than assuming.
Which letters do you actually need?
- Canopy, tray, van or no usable rear glass? Look for W. See waterproof rear dash cams explained.
- Want to read plates further down the road? Look for T or Tele. Our A329T review shows where the zoom helps.
- Carrying passengers? Look for 3CH, IR or TC. Start with do you need a cabin camera.
- Want front and rear in a simple kit? Look for 2CH or Duo. The A149 Pro Duo vs A129 Pro Duo covers the newest one.
Whichever you pick, match the hardwire kit to the camera, not the letters. Our VIOFO hardwire kit guide lists which kit suits which model.
Last reviewed: 17 September 2026. Meanings are drawn from how VIOFO names and describes its own products, and the worked examples use VIOFO's product descriptions. VIOFO does not publish an official naming guide, so where a pattern is loose we have said so. Retailer suffixes such as -G vary between sellers. If a model name or a description on this page is wrong or has gone out of date, tell us and we will correct it.