Treklo Blueline USB-A + USB-C charger socket with voltmeter, 12-24V, dust cap open showing two USB-A ports and one USB-C port
Treklo Blueline socket with 2 USB-A QC3.0 ports, USB-C PD3.0, voltmeter, on/off button and dust cap for 12-24V systems
Rear of the Treklo Blueline USB-A + USB-C voltmeter socket: label, threaded body, locking nut and spade terminals
Treklo Blueline USB-A + USB-C voltmeter socket dimensions: 37mm face, 50mm body length and 29mm mounting hole
Key features of the Treklo Blueline socket: 2 USB-A QC3.0 and 1 USB-C PD3.0 ports, on/off button, voltmeter and dust cap
What’s included: Treklo Blueline USB-A + USB-C socket with voltmeter, locking nut and 2 female spade connectors
Treklo Blueline USB-A + USB-C socket built-in voltmeter showing battery voltage through the clear-window dust cap
On/off power button on the Treklo Blueline USB-A + USB-C socket to cut parasitic draw when not in use

Treklo Blueline Trio USB-A + USB-C Charger Socket With Voltmeter 12-24V

5.04 reviewsIn stock SKU usb-bl-usbc-usba-volt
$19.00inc. GST

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  • Aussie warranty1 year, handled locally
  • Geelong supportReal people, real answers
  • Same day shippingOrder by 3pm AEST
$19.00Ships today by 3pm
Details

The full rundown

The Blueline Trio has two USB-A QC3.0 ports, one USB-C PD3.0 port and a digital voltmeter in a single socket.

Why it works

  • Charge three devices at once: 2 x USB-A QC3.0 plus 1 x USB-C PD3.0.
  • Integrated digital voltmeter: Monitor system voltage at a glance.
  • On/off power button: Reduce parasitic draw when not in use.
  • Clear-window dust cap: Protects ports while keeping voltage visible.
  • 12-24V compatibility: Suits vehicle, marine, and off-grid DC systems.

What's in the box

  • 1 x Treklo Blueline USB-A x2 + USB-C Charger Socket with Voltmeter
  • 1 x locking nut
  • 2 x female spade connectors

How it works

This socket connects directly to a 12V or 24V DC power supply and mounts into a standard round panel cutout. Press the integrated power button to activate charging and the voltmeter display. The USB-C PD3.0 port delivers fast charging for modern devices, while the USB-A QC3.0 ports handle accessories and legacy electronics.

What it suits

  • Works with 12V and 24V DC systems
  • Suitable for caravans, campervans, RVs, boats, and off-grid setups
  • Charges phones, tablets, cameras, GPS units, and power banks

Fitting it

Difficulty: 2/5 (Easy). Requires a round panel cutout and wiring to a DC power supply.

Features

  • 2 x USB-A QC3.0 fast-charge ports
  • 1 x USB-C PD3.0 fast-charge port
  • Integrated digital voltmeter
  • Manual on/off power control button
  • Protective dust cap with clear viewing window
  • Flush recessed mounting design
  • Durable ABS housing

Specifications

Input Voltage 12-24V DC
USB-A Output 5V/3A, 9V/2A, 12V/1.5A (QC3.0)
USB-C Output 5V/3A, 9V/3A, 12V/2.5A (PD3.0)
Total Ports 2 x USB-A, 1 x USB-C
Product Dimensions Approx Ø37MM face x 50MM depth
Mounting Hole Size Approx 29MM
IP Protection Splash-resistant with cap closed
Housing Material ABS Plastic
Reviews

What owners say

  • 5 stars: 4 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
M
Matt Zell

A bit pricey, but the postage was very fast. A+

I
Ivan Pearce

Recently purchased this item and have installed it in my caravan. Tested and works fine it will be very handy when we get to go on a trip

w
william Muller

Very handy to have in the van to change all the phones and tablets

B
Bill Horgan

As advertised quick delivery

From the Treklo crew

G'day, we're Treklo

We're a handful of blokes in Geelong who spend our weekends in utes, vans and campers. We got sick of 12V gear that gave up a few trips in, so we started making our own and running it in our own rigs first.

Not sure what you need? Flick us an email and one of us will sort you out. No sales script, just straight answers.

  • We run it ourselves

    Every bit of gear goes in our own rigs before it goes on the site.

  • Out the door today

    Order by 3pm AEST and it leaves Geelong the same day.

  • Sorted here if it plays up

    1 year Aussie warranty, handled by us, not a call centre.