VIOFO T340 3CH/4CH - Testing/Review - RCG

[rcg530]

Click on thumbnail image to see full size picture:



The VIOFO T340 3CH / 4CH dash camera has a new barrel design for the front camera which also includes an integrated QHD fisheye interior camera. The T340 offers the same general features as the A329S series of dash cameras with a variety of telephoto and rear camera configurations, but there is no SSD support like the A329S series offers.

• Specifications
  • Model Options
    • 3-Channel
      • T340 3CH : Front + IR Cabin + Rear
      • T340W 3CH : Front + IR Cabin + Waterproof Rear
    • 4-Channel
      • T340 4CH : Front + IR Cabin + Telephoto + Rear
      • T340WW 4CH : Front + IR Cabin + Dual Waterproof
      • T340TW 4CH : Front + IR Cabin + Telephoto + Waterproof Rear
  • Cameras / Lens
    • Front
      • Sony STARVIS 2 IMX678 8MP
      • F1.8 Aperture, FOV=140°
    • Fisheye Interior – Integrated into front camera case
      • OmniVision OSO4J10
      • F1.6 Aperture, FOV=210°
      • Fixed position - non-adjustable
        • The front and interior cameras are mounted in the same barrel style case with only and up/down adjustment present for the case. [see photos below]
        • The front camera aiming will dictate the aiming of the interior/cabin camera.
        • With the interior camera being a fisheye camera, the fact there is no separate up/down adjustment for the interior camera may not be problem for most installations.
    • Rear – RC420
      • Sony STARVIS 2 IMX675 5MP
      • F1.8 Aperture, FOV=160°
    • Telephoto – RTC420
      • Sony STARVIS 2 IMX675 5MP
      • F2.0 Aperture, FOV=35°
    • Waterproof Rear – RWC400
      • Sony STARVIS 2 IMX675 5MP
      • 8 M / 10 M / 15 M cable lengths available
  • HDR
    • Front
      • Only available when configured for 30 fps
    • Interior / Telephoto / Rear
      • You may only enable HDR for one of these cameras
  • Wi-Fi
    • Wi-Fi 6 (2.4 GHz & 5 GHz) / 2.4 GHz / 5 GHz
  • GPS
    • Quad-mode satellite coverage (GPS, BeiDou, Galileo, and GLONASS)
  • Voice Commands
    • Voice commands are available
  • Camera Connections
    • All cameras that connect with the front camera use a coaxial cable
  • CPL
    • Front: CPL-700 Included
      Interior: Not needed
      Telephoto: CPL-600 (Optional)
      Rear: CPL-600 (Optional)
  • Parking Modes
    • Hybrid
    • Low Power Impact Detection [LPID]
    • Standard [Auto Event Detection, Time-Lapse, Low Bitrate]
    • Vehicle Battery Protection
      • Timer Cut-Off
      • Voltage Cut-Off
      • Battery Pack Percentage Cut-Off
    • Geofencing GPS Zones – Optional Feature
      • Turns off or enters LPID parking mode when parked in one of the three available parking zones
    • Requires HK6-F or HK4 hardwire kit
  • Tamper-Resistant Cover
    • If you want to protect your camera cables and memory card from being removed from the front camera, you can install the tamper-resistant cover on the right side of the front camera

 

[rcg530]

I've not had the time to perform my full power consumption test suite for the T340.

Reserved for future power consumption test results.

 

[rcg530]

Reserved for future use

 

[Dan-UK1415]

Excellent looking camera, same shell style as BlackVue and without a screen, and with the bonus of a telephoto lens.

Looking forward to the video samples and comparisons.

 

[DashCamUser123]

You can run the front cam along with the telephoto at same time? Or how does that all work?

Where is the telephoto cam placed relative to the normal front cam?

 

[rcg530]

You can run the front cam along with the telephoto at same time? Or how does that all work?

Where is the telephoto cam placed relative to the normal front cam?

My vehicle that had the T340 4CH installed now has the T330 installed on the front windshield. My vehicle's windshield is a bit limited on free/usable dash camera space since I have six dash cameras on the front windshield.

I left the T340's RTC420 telephoto camera on my windshield while I have the T330 installed in the T340's place. I mounted the telephoto camera just above the T340 as you can see in the pictures [just above the T330 in the pics].

There's a 1.0 meter coaxial cable that connects the telephoto [or cabin/interior for the T330] to the front camera.

The right side picture of the T340 has an "EXT" port there the telephoto camera would connect to it.

Where you decide to place the RTC420 on your vehicle's windshield is up to you so it captures the field of view you want.

Before someone asks, I'm using a 3-D printed wedge shaped mount plate in addition to the T330/T340 windshield mount. My vehicle has a very curved windshield as you move out from the center. I've used wedge shaped mount plates to help counteract the severe curve of this vehicle's windshield. This helps level out and keep the field of view focused forward rather than off to the side. This should not be as much of an issue if the camera is mounted closer to the center of the windshield.

The T340 having the internal cabin/interior camera on the left end [same end as the front camera] might require the T340 front unit be mounted a bit lower [to avoid the center rear view mirror housing] or further to the right to allow the internal cabin/interior camera to have an unobstructed field of view of the passenger compartment. The other option would be to rotate the T340 180 degrees to have the front/interior cameras on the right side and then use the T340's settings to rotate those cameras' recorded images.

Here's an example of the T340 front camera and the RTC420 capturing the same vehicle at the same time. Having the RTC420 telephoto camera mounted just above the T340 did not obstruct its field of view since its field of view is very narrow. Since the T340 limits the number of cameras with HDR enabled to a max of two [front + one other], I had HDR enabled for the front camera plus the rear camera during this drive. That's why the telephoto's image is a bit overexposed compared to the front camera's image.

 

[ckhris]

Disappointed no LTE or Starvis 3… they look a lot like my blackvue… any idea if the processor has changed and other than T330 3ch and T340 4ch… what is the difference? So far they look the same but there are no numbers out… interested in knowing the heat rating and how hot they get in the new compaq design… blackvue is or was rated for higher temps than the previous Viofo models… in Texas this matters to me. I would have been all in on this if they had the LTE or Starvis 3… now Im thinking Ill keep running my old 900 X Plus until it dies or something else comes out… Im not sold on the Blackvue elites at all.

 

[DashCamUser123]

Here's an example of the T340 front camera and the RTC420 capturing the same vehicle at the same time. Having the RTC420 telephoto camera mounted just above the T340 did not obstruct its field of view since its field of view is very narrow. Since the T340 limits the number of cameras with HDR enabled to a max of two [front + one other], I had HDR enabled for the front camera plus the rear camera during this drive. That's why the telephoto's image is a bit overexposed compared to the front camera's image.

What I'm trying to find out is the following:

You can run both Front and Telephoto cams at the same time while driving. In Parking Mode, do you have to unplug the Telephoto cam to disable it or can you do it via a button or the settings in the Menu?

PS. How are the connectors on the cables? Are they affected by movement or jiggling like on the A139 model?

 

[rcg530]

What I'm trying to find out is the following:

You can run both Front and Telephoto cams at the same time while driving. In Parking Mode, do you have to unplug the Telephoto cam to disable it or can you do it via a button or the settings in the Menu?

There's a setting for the interior/telephoto/rear cameras that lets you decide when they should be enabled:

Pulling from the viofo_config.ini I have from the T340:

# Interior Camera, 0:Off; 1:On; 2:Only On while Driving; 3:Only On while Parking
Interior Camera=1
# Tele Camera, 0:Off; 1:On; 2:Only On while Driving; 3:Only On while Parking
Tele Camera=1
# Rear Camera, 0:Off; 1:On; 2:Only On while Driving; 3:Only On while Parking
Rear Camera=1

You can also configure the "Custom Button" on the lower right side of the T340 to perform an action during a short and long press of that button.

[Custom Key]
# Short Press,
# 2:Take a Photo
# 8:Turn On / Off HDR
# 6:Parking Mode
# 7:Switch to Timelapse Recording
# 10:Turn On / Off Interior Cam
# 11:Turn On / Off Rear Cam
# 9:Format SD
# 13:Turn On / Off Tele Cam
Short Press=2
# Long Press,
# 2:Take a Photo
# 8:Turn On / Off HDR
# 6:Parking Mode
# 7:Switch to Timelapse Recording
# 10:Turn On / Off Interior Cam
# 11:Turn On / Off Rear Cam
# 9:Format SD
# 13:Turn On / Off Tele Cam
Long Press=9

 

[indigo]

perfect

 

[indigo]

。what different the front camera t340 and t330

 

[rcg530]

。what different the front camera t340 and t330

Both models use the same front camera image sensor and lens.

• T330 Front Camera
  • Sony STARVIS 2 IMX678 8MP
  • F1.8 Aperture, FOV=140°
  • 53.2 Mbps video footage - 3CH mode, bitrate = Maximum
• T340 Front Camera
  • Sony STARVIS 2 IMX678 8MP
  • F1.8 Aperture, FOV=140°
  • 41.0 Mbps video footage - 4CH mode, bitrate = Maximum

 

[Chuck McCoy]

T330/T340

I forgot to ask this most important question;
Are your T330 & T340 & A149 Pro Pre-Production test units, or are the fully finished retail versions, (same as sold to customers)?
Reason I ask is because it's possible there might be hardware changes right?

 

[rcg530]

The F/stop information that I was originally provided for the T340's interior camera lens was incorrect. I stated F/2.2, but it's actually F/1.6. I've updated that information in my first post.

 

[rcg530]

I forgot to ask this most important question;
Are your T330 & T340 & A149 Pro Pre-Production test units, or are the fully finished retail versions, (same as sold to customers)?
Reason I ask is because it's possible there might be hardware changes right?

My T330/T340/A149 Pro were all pre-production/prototype units. The only "changes" I'm aware of between them and the production units is that there was a minor change in the T330/T340 windshield mount to address an issue I identified with my units.

 

[Chuck McCoy]

My T330/T340/A149 Pro were all pre-production/prototype units. The only "changes" I'm aware of between them and the production units is that there was a minor change in the T330/T340 windshield mount to address an issue I identified with my units.

Oh my gosh, what if LifeHackster installs another Pre-Production / Prototype, and he starts testing it with a rubber mallet again.
@SafeDriveSolutions

 

[rcg530]

With the release of the A149 Pro, T330, and T340 dash camera models, VIOFO stated that the A149 Pro should use the HK6-A hardwire and the T330/T340 models should use the HK6-F hardwire kit.

All three dash camera models can be powered by the older HK4 hardwire kit, the HK6, or the two new HK6 variants [HK6-A, HK6-F].

You can still use a HK4 hardwire kit to power the dash camera, but you'll miss out on the HK6 added features. When you use a HK4 hardwire kit, you miss out on the "Cut-Off Voltage" battery protection feature and the ability to display the vehicle's voltage level in the video's "Stamp" [status line]. That's true for all models that include those new features [A329S series, A119M Pro, A149 Pro, T330, T340].

The only difference between the HK6, HK6-A, and HK6-F hardwire kits is the USB-C connector that plugs into the dash camera.

I outline the differences in this other thread.

Thread 'VIOFO HK6 / HK6-A / HK6-F Hardwire Kits - What's The Difference'

Sep 16, 2026

With the release of the A149 Pro, T330, and T340 dash camera models on 15-Sep-2026, VIOFO included references to two new HK6 hardwire kit variants [HK6-A, HK6-F].

The only difference between the original HK6 and the two new variants is the connector on the end of the cable that plugs into the dash camera.

The original HK6 has a 90-degree USB-C connector, but so does the HK6-F. The difference being that the HK6-F has a shorter/slimmer USB-C connector end making it more appropriate for use with the T330/T340 dash cameras when the tamper-resistant cover is used with the T330/T340.

The...

• rcg530
• Replies: 2
• Forum: VIOFO Other

• 

 

[indigo]

Both models use the same front camera image sensor and lens.

• T330 Front Camera
  • Sony STARVIS 2 IMX678 8MP
  • F1.8 Aperture, FOV=140°
  • 53.2 Mbps video footage - 3CH mode, bitrate = Maximum
• T340 Front Camera
  • Sony STARVIS 2 IMX678 8MP
  • F1.8 Aperture, FOV=140°
  • 41.0 Mbps video footage - 4CH mode, bitrate = Maximum

if only open the front camera
how about the birrate of t330 and t340

 

[rcg530]

if only open the front camera
how about the birrate of t330 and t340

I just tested a 3CH, 2CH, and 1CH T330 configurations. Temporarily, I cannot test the T340.

The bitrate I previously reported for the T330 was with older beta firmware installed. VIOFO will tune/adjust the bitrates as needed until the production release of the firmware/product.

I now have firmware v1.0_260910 installed in the T330.

I examined 2CH [front+rear] footage from this morning's drive and the front bitrate was 49.1 Mbps. A 1CH [front] configuration created 49.1 Mbps front video footage. As a 3CH configuration [front+rear+interior], the front video bitrate dropped to 41.0 Mbps. This morning's 1CH and 3CH tests were with the vehicle stationary. I'll check the bitrate the next time I drive the vehicle.

• T330 Front Camera
  • Sony STARVIS 2 IMX678 8MP
  • F1.8 Aperture, FOV=140°
  • Bitrates - Maximum Bitrate Setting
    • v1.0_260910 firmware
      • 3CH:
        • Front 41.0 Mbps
        • Rear 23.8 Mbps
        • Interior 23.8 Mbps
      • 2CH:
        • Front 49.1 Mbps
        • Rear 27.0 Mbps
      • 1CH:
        • Front 49.1 Mbps

 

[indigo]

I just tested a 3CH, 2CH, and 1CH T330 configurations. Temporarily, I cannot test the T340.

The bitrate I previously reported for the T330 was with older beta firmware installed. VIOFO will tune/adjust the bitrates as needed until the production release of the firmware/product.

I now have firmware v1.0_260910 installed in the T330.

I examined 2CH [front+rear] footage from this morning's drive and the front bitrate was 49.1 Mbps. A 1CH [front] configuration created 49.1 Mbps front video footage. As a 3CH configuration [front+rear+interior], the front video bitrate dropped to 41.0 Mbps. This morning's 1CH and 3CH tests were with the vehicle stationary. I'll check the bitrate the next time I drive the vehicle.

• T330 Front Camera
  • Sony STARVIS 2 IMX678 8MP
  • F1.8 Aperture, FOV=140°
  • Bitrates - Maximum Bitrate Setting
    • v1.0_260910 firmware
      • 3CH:
        • Front 41.0 Mbps
        • Rear 23.8 Mbps
        • Interior 23.8 Mbps
      • 2CH:
        • Front 49.1 Mbps
        • Rear 27.0 Mbps
      • 1CH:
        • Front 49.1 Mbps

u are perfect