VIOFO HK4 Hardwire Kit Type-C for A329 A229 A119

The VIOFO HK4 Hardwire Kit supplies continuous, protected 12/24V power to compatible VIOFO dash cams for 24-hour parking surveillance and automatic parking-mode switching.

If you want reliable, vehicle-integrated power for your VIOFO dash camera without leaving the engine running, the HK4 hardwire kit is built to connect the camera to your car’s fuse box and battery. It supports 12V and 24V systems, includes a Type-C output for modern dash cams, and adds low-voltage battery protection plus ACC detection so the camera automatically changes modes when you start or stop your vehicle.

How does the HK4 keep your battery safe while powering a dash cam?

The HK4 features selectable low-voltage cut-off options so the kit will stop supplying power when your vehicle battery reaches a pre-set voltage, preventing deep discharge. Ground, ACC, and constant power lines are clearly defined to ensure safe installation and function.

• Four low-voltage cut-off settings to protect battery life.
• Red cable for constant power, yellow for ACC (ignition), and black ground to chassis.
• Works on 12V and 24V vehicles including cars, trucks, and SUVs.

What dash cams and vehicles is this hardwire kit compatible with?

The HK4 is designed specifically for a range of VIOFO models and is not universal. It fits A329S, A229Plus, A229Pro, A119Mini2, A139Pro, WM1, and T130 models; check model compatibility before ordering to ensure correct operation.

• Compatible models: A329S, A229Plus, A229Pro, A119Mini2, A139Pro, WM1, T130.
• Not compatible with other VIOFO series outside the listed models.
• Accepts 12V–24V vehicle electrical systems for wide vehicle coverage.

How is the kit installed and what additional parts are required?

Installation routes the HK4 wiring into the vehicle fuse box and secures the ground to the chassis; the kit requires fuse taps to connect to both constant and ACC fuses. VIOFO offers the HK4 with an 8-piece full set of fuse taps for a complete installation, or taps can be bought separately.

• Includes a 13.1 ft (4 m) hardwire cable with Type-C output for the dash cam.
• Requires two fuse taps (constant and ACC); 8-piece fuse tap set available as an option.
• Ground must be connected to vehicle body; red to constant, yellow to ACC fuse slot.

Will the HK4 automatically switch my dash cam to parking mode?

Yes — the HK4’s ACC detection signals the dash cam to enter parking mode when the engine is turned off and to resume normal recording when the engine starts. This automatic transition helps ensure events are captured while parked without manual intervention.

• ACC detection triggers parking mode after ignition off.
• Normal recording resumes when ignition is on.
• Compatible dash cams will record collision or motion events while parked.

Who is this for: Technicians, DIY installers, and vehicle owners who use the specified VIOFO dash cam models and want a permanent, protected power solution for around-the-clock surveillance. It’s ideal for drivers of personal cars, commercial vehicles, and fleet rigs that require continuous recording and battery protection without the need to run the engine.