VIOFO HK4 vs HK6

If you're looking to unlock full parking surveillance features on your VIOFO dash cam, choosing the right hardwire kit is essential. VIOFO currently offers two options: the HK4 and the HK6. While both supply constant power when the engine is off, they differ in functionality, compatibility, and supported features.

In this guide, we compare the HK4 and HK6 in detail — helping you select the correct kit based on your dash cam model and your parking protection needs.

Why Use a Hardwire Kit?

A hardwire kit powers your dash cam directly from the vehicle’s fuse box, allowing it to stay active when the ignition is off. This enables Parking Mode, so your camera can monitor for motion or impact and record incidents even when you're not in the vehicle.

However, not all hardwire kits are interchangeable. VIOFO’s HK4 and HK6 kits are tailored to specific models, each unlocking different levels of functionality.

VIOFO HK4 – For Broad Compatibility and Standard Parking Modes

The HK4 is VIOFO’s original 3-wire hardwire kit, compatible with a wide range of dash cam models. It enables reliable Parking Mode functions such as time-lapse, low bitrate, and buffered event recording.

Compatible With:

• A119 MINI 2

• A229

• T130

• WM1

• A139 / A139 PRO

• A329 (not A329S/T/W)

Key Features:

• 3-wire setup (ACC / BATT / GND)

• Adjustable low-voltage protection (11.8V / 12.0V / 12.2V)

• Built-in parking timer

• Enables standard Parking Modes

Supported Parking Modes:

• Time-Lapse Recording: Records continuously at selectable frame rates (1 / 2 / 3 / 5 / 10 FPS) to reduce file size and save storage.

• Low Bitrate Recording: Continuous recording at lower resolution and bitrate to conserve space while capturing video with audio.

• Event Detection: Buffered recording — captures 15 seconds before and 30 seconds after motion or impact.

These modes are suitable for everyday parking situations, such as work, malls, or home environments.

VIOFO HK6 – For Advanced Power Management (A329S / A329T / A329W Only)

The HK6 is VIOFO’s next-generation hardwire kit, purpose-built to enable advanced parking features on select new models: the A329S, A329T, and A329W. These models support smarter, low-power modes not available on the standard A329.

Compatible Only With:

• A329S

• A329T

• A329W

Not Compatible With:

• A119 MINI 2

• A229

• T130

• WM1

• A139 / A139 PRO

• A329

Key Features:

• Ultra-efficient low-power design

• Adjustable low-voltage cutoff and timer

• Supports Hybrid and Low Power Parking Modes

• Designed specifically for the A329S/T/W models

Supported Advanced Parking Modes:

• Low Power Impact Detection

  • Uses minimal power in standby

  • Wakes up instantly (~2 seconds) on impact

  • Records a 1-minute video to capture the event

  • Ideal for long-term or overnight parking

• Hybrid Parking Mode

  • Starts in time-lapse or low bitrate

  • Auto-switches to impact-triggered recording when motion or voltage conditions are met

  • Combines continuous surveillance with power-saving efficiency

Feature Comparison: VIOFO HK4 vs HK6

Which One Should You Choose?

Choose the HK4 if:

• You use a VIOFO A119 MINI 2, A229, T130, WM1, A139, or the standard A329

• You want access to reliable, basic parking surveillance

• Your parking sessions are typically short or in secure areas

Choose the HK6 if:

• You use a VIOFO A329S, A329T, or A329W

• You need advanced parking protection with efficient power management

• You often park overnight or in locations with potential risk

Frequently Asked Questions (FAQs)

• Is the HK6 compatible with the A329?
  No. The A329 does not support the HK6. Only A329S, A329T, and A329W are compatible.

• Can the HK4 be used with A329S/T/W?
  No. These models require HK6 to enable their advanced parking functions.

• Do both kits offer battery protection?
  Yes. Both HK4 and HK6 include adjustable low-voltage cutoff to protect your vehicle’s battery.

• Are the kits easy to install?
  Yes, especially if you're comfortable with your vehicle’s fuse box. If not, professional installation is recommended.

• Do the kits come with the dash cam?
  No. HK4 and HK6 are sold separately and must be purchased in addition to the dash cam.

Conclusion

Both HK4 and HK6 are excellent accessories for extending your dash cam's protection capabilities while your car is parked — but they are designed for very different models. The HK4 supports a wide range of VIOFO dash cams, including the standard A329, and provides dependable parking features. The HK6, on the other hand, is built for the A329S, A329T, and A329W, enabling smarter, more energy-efficient parking surveillance modes.

Make sure to match your dash cam model with the correct hardwire kit to take full advantage of everything VIOFO Parking Mode has to offer.