A UHF CB is one of the cheapest and most important upgrades you can make to a touring 4WD. Here's why it matters offroad, whether to mount it or carry it, the channels convoys actually use, and the radio we'd fit first.
Out on the tracks, mobile phone coverage disappears fast. A UHF CB radio is how 4WDers stay in touch when there are no bars — and it does jobs a phone simply can't. You can talk to everyone in your convoy at once, warn the vehicle behind about a washout or an oncoming truck on a single-lane climb, call ahead before tackling a blind, narrow section, and coordinate a recovery when someone gets bogged.
It's also a safety net. Many popular tracks have informal "working" channels, and other travellers monitoring nearby can relay a message or lend a hand if you strike trouble. For the price of a tank or two of fuel, it's the cheapest insurance in your kit. UHF CB in Australia runs on 80 channels at up to 5 W, with no licence and no fee — so there's nothing stopping you switching it on and using it today.
Quick reminder: keep Channel 5 (and its repeater input, 35) clear — it's the designated emergency calling channel. Channels 22 and 23 are data only (no voice), and 61, 62 and 63 are reserved. Everything else is fair game.
For a dedicated touring 4WD, a vehicle-mounted UHF with a roof or bullbar antenna is the better long-term setup, and it isn't close. The reason is range. Both handhelds and mounts are capped at 5 W, so power isn't the difference — the antenna is. An external antenna mounted high and clear of obstructions transmits and receives far better than the stubby antenna on a handheld held down at seat height inside a metal cab.
In practice, a well-fitted mount with a good antenna can reach roughly 10–25 km across open country, dropping to around 1–5 km in hilly or heavily timbered terrain. A handheld inside the vehicle will manage a fraction of that. A mount also gives you a louder speaker that cuts through engine and tyre noise, a permanent power source so you're never flat, and a fixed mic that's easy to grab.
That said, a handheld still earns its place. It's perfect for spotting outside the vehicle during a tricky obstacle, walking a line before you drive it, chatting around camp, or as a backup if the fixed radio plays up. Plenty of serious tourers run both — a permanent mount for driving and a rugged handheld for everything off the truck. If you can only buy one for a touring rig, fit the mount. For the full breakdown, see our handheld vs vehicle-mount comparison.
None of these channels are assigned by law — they're widely-followed conventions that keep everyone on the same page. Learn them and you'll slot straight into how Australian travellers communicate:
A common touring habit is to keep one radio (or a dual-watch scan) on 40 for highway awareness and your group chatting on 10. If a channel's busy, just pick a clear one and let your group know — that's the whole etiquette.
Because every UHF CB is limited to 5 W, your antenna does the heavy lifting. Antennas are rated in dB gain, and the right choice depends on terrain:
Most tourers settle on a mid-gain antenna (around 4.5–6.6 dB) as the best all-rounder, or carry two and swap depending on where they're heading. Mounting height and a clean earth also matter: get the antenna up high, clear of the body, and make sure it's tuned. A great radio on a poorly-fitted antenna will always disappoint.
For a permanent touring setup, our pick is a compact, app-connected mount paired with a quality handheld for outside the vehicle.
The tourer's mount. A tiny hide-away body tucks neatly behind the dash while Bluetooth and the GME XRS app give you slick scanning and channel control from your phone. Paired with a decent mid-gain antenna it comfortably out-ranges any handheld, and it's built and supported in Australia. Install takes some effort and it sits at the premium end — but for a rig you'll tour in for years, it's superb. Add the GME XRS-660 handheld for spotting and camp use and you've got the complete touring kit.
Vehicle mount · 5 W · 80 CH · IP67 · Bluetooth · ~$349 (+ antenna)
On a tighter budget? The GME TX3500S has been the default 4WD mount for years — no Bluetooth and a basic display, but rock-solid performance for noticeably less. For the handheld, the Uniden UH850S delivers 5 W, IP67 and long battery life at a value price.
Once you've decided on a setup, line the models up side by side. See our ranked best two-way radios for 2026, or filter every model by use case, power and price with the comparison tool. New to UHF entirely? Start with how to choose a two-way radio and range explained.
Compare mounts and handhelds side by side — filter by 4WD, power, water rating and price.