Viofo

Viofo A129 Plus Duo

Name: Viofo A129 Plus Duo
Brand: Viofo
Price: 200 USD
Availability: InStock

No rating shown: we have no owner rating for this camera from a source we can cite. Why

60fps frontSupercapacitor

The A129 Plus Duo is the previous generation of Viofo's mainstream front-and-rear kit, and it is still sold because it undercuts the A229 line by a useful margin. The front camera is a 5MP Sony STARVIS IMX335 shooting 2560x1440 at 60fps behind an f/1.6 lens quoted at 140 degrees; the rear is a 2MP IMX307 at 1080p on a wider 160-degree lens, which is the usual arrangement - the rear camera's job is to show you what hit you, not to read a plate at distance. HDR is front-only. Connectivity is where its age shows: the Wi-Fi radio is 2.4GHz, so pulling a long clip is slow, there is no voice control, the card limit is 256GB, and the hardwire cable is the older mini-USB HK3 rather than the Type-C kits the current line shares. Power is a supercapacitor, rated -4 to 149 degrees Fahrenheit, which is the part worth paying for and the part the A129 never compromised on.

Approx. price: ~$200
Hot car: Supercapacitor; Supercapacitor, rated to 149°F
Parking tier: Buffered; Hardwire kit optional

Best for

A two-channel install on a budget, where 2.4GHz downloads are an acceptable trade.

The description and the pros and cons above are written from published specifications, not from owner reports. Owner sentiment, where we have it, is in its own section below.

What the numbers mean here

The front camera records 2,560 horizontal pixels across a published 140-degree field of view, which is 18.3 pixels per degree — plate-legible close in. The rear channel manages 12, so it is the less detailed of the two. How this is calculated, and what it does not tell you.

It runs on a supercapacitor rather than a lithium cell, so there is no battery to swell in a car parked in summer sun — the classic way a windshield-mounted camera dies. The maker publishes an operating range of -4°F to 149°F. Supercapacitors and heat.

Keeps a rolling buffer, so the seconds before an impact are saved as well as the impact itself. It is the most useful parking mode and the hungriest. The hardwire kit is a separate purchase, which is the line item people forget when budgeting. What each parking mode records.

Specifications

Manufacturer-published figures, recorded from Viofo’s own product page and a specialist retailer’s spec table. Fields the maker does not publish are omitted rather than guessed.

Type: Dual-channel
Channels: 2
Front resolution: 1440p
Front frame rate: 60fps
Front sensor: Sony STARVIS IMX335
Front field of view: 140° (as published)
Front aperture: f/1.6
Rear resolution: 1080p
Rear sensor: Sony STARVIS IMX307
Rear field of view: 160°
HDR: HDR
Power cell: Supercapacitor
Operating temperature: -4°F to 149°F
Parking modes: buffered, time-lapse, low-bitrate, motion
Hardwire kit: optional
GPS: built-in
Wi-Fi: 2.4 GHz
LTE / cloud: None
Max storage: 256GB microSD
CPL filter: optional
Screen: 2.0-inch
Voice control: No
Form factor: wedge
Mount: adhesive
Release year: 2020

Features

Front 2560x1440 at 60fps with HDR, rear 1080p at 30fps
Sony STARVIS IMX335 front, IMX307 rear
Supercapacitor power, -4 to 149 degrees Fahrenheit
Built-in GPS logger and a 2-inch screen
Buffered, time-lapse, low-bitrate and motion parking with the mini-USB HK3 cable
microSD cards up to 256GB

Where it is strong

Front and rear coverage at a price where most of the catalog is single-channel
60fps on the front channel, which the newer 2K Viofos kept and most rivals still do not offer
Supercapacitor power at a budget price point
The rear camera is a real Sony STARVIS module, not the generic sensor budget dual kits usually ship

Where it gives way

2.4GHz Wi-Fi only - downloading a few minutes of dual-channel footage is genuinely slow
256GB card ceiling, which two channels eat through quickly
No voice control, and the original STARVIS sensors are a generation behind the A229 line
Mini-USB hardwire cable, incompatible with the Type-C kits every newer Viofo uses

What owners say

Summarised from public owner discussion. Nothing here is our own testing.

This is the camera that comes up whenever someone asks for two channels, a supercapacitor and a price starting with one. Owners who have had one for years are generally content with it, and the rear camera gets specific credit for being a real Sony module rather than the throwaway most budget dual kits pair with a decent front camera.

Most of what owners raise is about the generation this camera belongs to rather than its design. The 2.4GHz Wi-Fi makes app playback stutter every couple of seconds, which turns reviewing a clip into a chore, and owners in hot states worry about the camera surviving a parked summer afternoon - some ask whether dropping the recording resolution would help, and a few switch parking mode off entirely after a scare.

Two practical warnings recur. The adhesive mounts are effectively single-use, so moving the camera between cars means buying mounts. And external battery packs do not always hand over power cleanly at engine-off; owners report the camera shutting down instead of entering parking mode, which defeats the point of the battery.

What owners like

Owners looking for two channels with a supercapacitor under about $150 keep landing back on this one, because very little else meets all three conditions
Long-term owners report several untroubled years, and people replacing one often buy the same thing again
The rear camera being a real Sony sensor rather than a generic module gets noticed - owners say rear footage is usable rather than decorative
Still the cheap answer for a second household car once the main car has a newer camera

Common complaints

App playback is the loudest complaint: owners describe video that buffers every couple of seconds over the 2.4GHz Wi-Fi, which makes reviewing anything on a phone painful
Heat is the second: owners in places that see 100F summers ask whether dropping the resolution will stop it overheating, and some turned parking mode off after a scare
The adhesive mounts are single-use in practice - owners moving the camera between cars have to buy new mounts
External battery packs do not always hand over cleanly; owners report the camera shutting down at engine-off instead of switching to parking mode
Owners have opened the card to find weeks of footage simply gone, with no error shown at the time

What owners of the Viofo A129 Plus Duo ask

Why is app playback so slow?

The A129 Plus Duo has a 2.4GHz Wi-Fi radio, and owners describe playback that buffers every couple of seconds over it. Downloading the clip to the phone first and playing it locally is the workaround people settle on. The newer A229 line moved to 5GHz specifically to fix this.

Will it overheat in a hot climate?

Owners in states that see 100F-plus summers raise this regularly. The supercapacitor is the right power system for heat and is the reason this camera is recommended over battery-powered rivals, but no windshield camera is immune. The measures owners take are parking in shade where possible, using a sunshade, and lowering the recording resolution in summer to reduce the camera's own heat output.

Can I reuse the mounts when I move it to another car?

Usually not. The adhesive pads are designed to stay put and owners who peel a mount off generally find it will not hold reliably again. Buy replacement adhesive pads at the same time as you plan the move; they are inexpensive and Viofo sells them for this camera specifically.

Does it work with an external battery pack?

It can, but owners report handover problems - the camera shuts off at engine-off rather than switching to parking mode on battery power. Check that the pack's output is on the camera's constant-power lead rather than the accessory lead, and expect to spend some time on the wiring before it behaves.