Dongar USB-C→RJ11 Converter Cable – 30 cm Power Lead

Dongar USB-C to RJ11 Converter. A short, tidy power lead for RJ11-powered accessories

This is a 30 cm converter cable that takes power from a USB-C source, such as a Dongar mirror adapter, and delivers it through an RJ11 connector. It exists so you can power an RJ11 accessory from the mirror area instead of running a cable down to the 12V socket.

Read this before you order. RJ11 is a telephone-style connector, and it is not a dash cam power standard. Dash cams use USB-C, micro-USB, mini-USB or a DC barrel plug. If you are here looking to power a dash cam, this is almost certainly the wrong cable, and we would rather tell you that now than process a return. For dash cams, use the USB-C Converter Bundle for micro-USB and mini-USB cameras, or the USB-C to DC cable for barrel-plug cameras.

Trust the Dash Cam Guys: Authorised AU reseller. Ships from Melbourne within 24 hours^*. 12-month warranty handled here in Australia. Local technical support. 30-Day No-Worries returns.

Who This Isn't For: Any dash cam. Also not for you if your USB-C source only outputs 5V while your device expects around 12V on the RJ11 pins, because the cable alone will not step voltage up. Check what your device actually needs first, and check that its use is legal in your state before fitting it.

DCG Score & Highlights

What We Love

• Neat 30 cm length keeps the windscreen area free of looped cable
• Plug and play from a Dongar mirror adapter with no fuse tapping or splicing
• Works with any Dongar adapter in the range

What Could Be Better

• Narrow use case. RJ11 power is uncommon and no dash cam we sell uses it.
• 30 cm is short if your device does not sit near the mirror

Why a Clutter-Free Install Matters

Shortening the power run at the mirror reduces cable snags, rattles and distraction. A clean setup is faster to install, easier to remove and keeps your attention on the road rather than on a cord swinging off the windscreen.

Top Benefits

• OEM-style finish: The compact 30 cm length hides excess cable for a tidy windscreen.
• No splicing required: Connects straight to a Dongar adapter's USB-C output.
• Honest fitment advice: Message our installers with your device model and we will confirm compatibility before you buy.

Not Sure This Is the Cable You Need?

Send us the make and model of the device you are powering and we will tell you straight whether this suits it. Fast Melbourne dispatch, easy returns and local support.

Last updated: August 2026