This VIOFO hardwire kit guide explains the difference between the HK4 and HK6 hardwire kits. If you want to use parking mode on your VIOFO dash cam, choosing the right hardwire kit is important for stable power, low-voltage battery protection and proper parking mode operation.

If you want to use parking mode on your VIOFO dash cam, a hardwire kit is one of the most important accessories to choose correctly.

Two common VIOFO hardwire kits are the HK4 and HK6. Both are designed to power the dash cam from the vehicle fuse box, support parking mode, and help protect the car battery with low-voltage cutoff.

However, they are not exactly the same.

The simple answer is:

• HK4 is a simple and reliable hardwire kit used with many VIOFO models, including the A229 series.
• HK6 is the newer, more advanced option designed for better integration with supported newer models such as the A329S.
• For the A329S, both HK4 and HK6 may provide parking mode and battery protection, but HK6 gives extra features such as Bluetooth detection, voltage display, and in-camera voltage cutoff settings.

Quick answer

VIOFO Hardwire Kit Guide: HK4 vs HK6

For most Australian customers, the easiest rule is:

A229 series = HK4
A329S = HK6 recommended

What does a VIOFO hardwire kit do?

A hardwire kit connects your dash cam directly to the vehicle’s fuse box instead of using the 12V cigarette socket.

This allows the dash cam to receive power even when the ignition is off, which is required for proper parking mode operation.

A hardwire kit can provide:

• Parking mode power
• Ignition detection
• Cleaner cable installation
• Low-voltage battery protection
• Automatic switching between driving and parking mode

Without a hardwire kit, most users will only have normal driving recording.

Why parking mode needs a hardwire kit

Parking mode allows the dash cam to monitor your vehicle while parked.

Depending on the VIOFO model and settings, parking mode may include:

• Auto event detection
• Time lapse recording
• Low bitrate recording
• Impact-triggered recording
• Hybrid parking mode on supported models

This is useful for parked incidents such as:

• Hit-and-run damage
• Car park impacts
• Vandalism
• Suspicious activity around the vehicle

For many Australian drivers, parking mode is one of the main reasons to add a hardwire kit.

What is the VIOFO HK4?

The VIOFO HK4 is a simple, proven hardwire kit used with many VIOFO dash cams.

It has a compact control module, USB-C output to the dash cam, and three vehicle-side wires:

• Red wire: constant 12V power
• Yellow wire: ACC / ignition power
• Black wire: ground

The HK4 also includes built-in low-voltage battery protection with selectable cutoff levels such as 11.8V, 12.0V, 12.2V, and 12.4V.

HK4 is best for

• A229 Plus
• A229 Pro
• A229 Ultra
• Many other compatible VIOFO dash cams
• Customers who want a simple and reliable parking mode setup

Main strengths of HK4

• Simple installation
• Built-in low-voltage cutoff
• Reliable parking mode power
• Good choice for the A229 series
• Lower complexity than HK6

What is the VIOFO HK6?

The VIOFO HK6 is a newer hardwire kit designed for better integration with supported VIOFO models, especially the A329S.

Compared with HK4, the HK6 has a more modular design with a Bluetooth-enabled module and detachable cables. Safe Drive Solutions describes the HK6 as having a main Bluetooth module and detachable cables, while still using the familiar red, yellow, and black vehicle wiring.

HK6 is best for

• VIOFO A329S
• Customers who want the most complete A329S parking mode setup
• Users who want voltage information displayed through the camera
• Users who want cutoff voltage settings controlled through the dash cam menu

Main strengths of HK6

• Bluetooth communication with supported cameras
• Camera can detect the hardwire kit
• Vehicle voltage can be shown through the dash cam
• Cutoff voltage can be adjusted in the camera menu
• Better integration with A329S parking mode
• More advanced than HK4

HK4 vs HK6: main differences

Important correction: does HK4 work with A329S?

Yes, according to Safe Drive Solutions’ hands-on comparison, HK4 can power the A329S and still provides low-voltage protection. The article explains that the A329S does not lose low-battery protection when using HK4 because the HK4 has its own built-in cutoff selector.

However, HK4 does not broadcast voltage information to the A329S.

That means if you use HK4 with A329S, the dash cam may show a message such as “no Bluetooth hardwire kits” when trying to access the camera’s cutoff voltage option. This does not mean HK4 has no battery protection. It means the camera cannot communicate with HK4 via Bluetooth.

Simple explanation

With HK4 on A329S:

• Parking mode can still work
• Low-voltage protection is handled by the HK4 module
• Cutoff level is selected on the HK4 module
• The camera does not receive Bluetooth voltage data
• The camera menu cannot control the HK4 cutoff voltage

With HK6 on A329S:

• Parking mode can work
• Low-voltage protection is integrated more closely
• The camera can detect the hardwire kit
• Voltage can be shown through the camera
• Cutoff voltage can be selected in the camera menu

Why HK6 is better for A329S

If you are buying the A329S, the HK6 is still the recommended choice.

The HK6 allows the A329S to detect the hardwire kit and display vehicle battery voltage. It can also expose cutoff voltage options inside the dash cam menu, such as 12.4V, 12.2V, and 12.0V.

This makes the HK6 better if you want the full A329S experience.

Choose HK6 for A329S if you want:

• Full hardwire kit integration
• Bluetooth detection
• Voltage readout
• Easier cutoff voltage settings
• Better hybrid parking mode control
• The most complete setup for A329S

Why HK4 is still useful

The HK4 is still a strong hardwire kit.

For many VIOFO models, especially the A229 series, HK4 is the right choice. It is simple, reliable, and provides the main features most drivers need:

• Power for parking mode
• ACC ignition detection
• Low-voltage battery protection
• Clean installation

For customers who do not need voltage telemetry or in-camera voltage settings, the HK4 remains a practical option.

HK4 vs HK6 for A329S

This is where many customers get confused.

HK4 with A329S

Best if:

• You already have an HK4
• You want a simple hardwire setup
• You do not need voltage display
• You are happy setting cutoff voltage on the HK4 module

Limitations:

• No Bluetooth communication
• No voltage readout through the camera
• No in-camera cutoff voltage adjustment

HK6 with A329S

Best if:

• You are buying a new hardwire kit
• You want the recommended A329S setup
• You want voltage readout
• You want cutoff settings inside the dash cam menu
• You want the cleanest compatibility with A329S

Limitations:

• More advanced setup than HK4
• Usually the better choice specifically for A329S

Low-voltage battery protection explained

Low-voltage protection helps prevent the dash cam from draining your car battery too far while parked.

When the battery voltage drops below the selected level, the hardwire kit or dash cam system reduces operation or shuts down depending on the model and parking mode.

The HK4 has low-voltage cutoff built into the hardwire kit module, while the HK6 can communicate voltage information to supported cameras such as A329S.

For many Australian vehicles, a higher cutoff such as 12.2V or 12.4V is safer if the car is not driven daily. A lower cutoff may allow longer parking recording but can place more load on the battery.

Which cutoff voltage should you use?

General guide:

This is general guidance only. Vehicle battery condition, driving habits, and installation method can all affect the best setting.

Professional installation is recommended

Hardwire installation involves connecting to the fuse box. For the best result, professional installation is recommended if you are not confident with vehicle wiring.

A proper installation should include:

• Correct constant power fuse
• Correct ACC / ignition fuse
• Secure ground point
• Safe cable routing
• Correct fuse taps
• Correct voltage cutoff setting
• Testing driving mode and parking mode

A clean install is especially important for modern vehicles with sensitive electronics.

Which hardwire kit should you buy?

Choose HK4 if:

• You have an A229 Plus
• You have an A229 Pro
• You have an A229 Ultra
• You want a simple reliable hardwire kit
• You do not need Bluetooth voltage communication

Choose HK6 if:

• You have an A329S
• You want full A329S parking mode integration
• You want voltage readout
• You want cutoff settings through the camera menu
• You are buying a new kit for A329S and want the best match

Final recommendation

For most customers:

• A229 Plus / A229 Pro / A229 Ultra: choose HK4
• A329S: choose HK6
• A329S with existing HK4: HK4 may still work, but you miss the HK6’s Bluetooth voltage features

The HK4 is simple and reliable. The HK6 is more advanced and better suited to the A329S.

If you are buying new for the A329S, choose the HK6.

For most Australian drivers, this VIOFO hardwire kit guide comes down to choosing the HK4 for simple, reliable parking mode or the HK6 for newer VIOFO models with more advanced integration.

Need help choosing?

Not sure whether you need HK4 or HK6? View official VIOFO hardwire kit information

Contact VIOFO Dashcam Australia for help choosing the correct hardwire kit, memory card, and bundle for your vehicle.

Shop HK4 Hardwire Kit

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