We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-28 · 7 min read · Independent comparison
If you want a hands-free, all-day communication tool built for the cab of a truck, choose Garmin dēzl™ Headset 100; if you need compact true wireless earbuds for music, calls, and everyday listening on the move, choose Marshall Minor IV True.
• Garmin dēzl™ Headset 100 — biggest strength: a single-ear over-ear design with active noise cancellation in both the ear cup and boom mic, plus up to 50 hours of talk time.
• Garmin dēzl™ Headset 100 — biggest trade-off: it's a one-ear mono headset with no true stereo music experience, and it leans on a boom mic rather than a pocket-sized form factor.
• Marshall Minor IV True — biggest strength: true wireless in-ear buds with Marshall's signature sound, a wireless charging case, and 30+ hours of total playtime.
• Marshall Minor IV True — biggest trade-off: no active noise cancellation, and the in-ear bud design means less isolation than a sealed over-ear cup.
• Who each pick is for: the Garmin is for drivers who live on calls and need hands-free navigation audio; the Marshall is for listeners who want portable music with a recognizable sound signature.
The Garmin dēzl™ Headset 100 is a purpose-built trucking headset, and it doesn't pretend to be anything else. It's a single-ear over-ear design in black, with a plush memory foam-padded ear cushion and corrosion-resistant construction. The active noise cancellation works in the ear cup and the boom mic, which is the detail that matters most here: it's not just about blocking road noise from reaching you, it's about keeping your voice clear for the person on the other end of the call. The dynamic driver covers a 20 Hz – 20,000 Hz range, so media playback is handled competently, but the real job is two-way communication.
Battery is where this headset separates itself. Garmin rates it at up to 50 hours of talk time, and a full charge takes about 2.5 hours. For anyone running long shifts, that's the difference between charging every night and charging once a week. Bluetooth 5 keeps the wireless link stable with a 10-meter range, and there's a 3.5 mm jack as a wired fallback. The box includes a storage hook, USB cable, and aux cable, and the whole package ships in a rigid box.
The clever part is the ecosystem tie-in. Pair the headset with a dēzl OTR truck navigator (sold separately) and you hear navigation prompts and use voice commands while your hands stay on the wheel. If you already run Garmin's truck navigation gear, this headset slots into that workflow instead of competing with it.
Who should buy it: professional drivers, long-haul operators, and anyone who spends hours on the phone from a vehicle and wants one ear free to hear the world around them. Who should skip it: if you want immersive stereo music, a sealed quiet-cabin experience, or something that disappears into your pocket, this isn't that product. It's a tool, and it's shaped like one.
Marshall Minor IV True is a true wireless in-ear earbud set with a clear personality. The 12 mm dynamic drivers deliver what Marshall calls its signature sound — an expertly balanced tuning that leans into presence rather than neutrality. The buds are in-ear, black, and paired with a black leather carrying case that doubles as a wireless charging case. At 32 ohm impedance and 110 dB sensitivity, they're easy to drive from a phone, and the frequency range matches the usual 20 Hz – 20,000 Hz span.
Playtime is the headline: 30+ hours total with the charging case, and the case itself charges in about 3 hours from a 500 mAh cell. The case weighs 40 g, so it's genuinely pocketable in a way the Garmin simply isn't. Bluetooth 5.3 handles the connection, with a range of about 33 feet, and multipoint lets you stay connected to two devices at once while remembering up to 8 previously paired ones. Setup is refreshingly simple — open the case, hold the button until the LED pulses blue, and pick Minor IV from your Bluetooth list.
Controls are touch-based on the buds themselves, for playback and calls. The Marshall Bluetooth app is optional but adds real value: personal EQ adjustment, over-the-air firmware updates, and a battery preservation mode designed to extend the earbuds' lifespan. Marshall also supports replacing spare parts, which is a quietly pro-consumer move in a category full of sealed disposables. The IPX4 rating means sweat and light rain are fine, but not submersion.
Who should buy it: commuters, gym-goers, students, and anyone who wants portable music and phone calls with a distinctive sound and a genuinely small carry footprint. Who should skip it: if you need active noise cancellation to kill engine drone or loud ambient noise, these buds don't offer it — noise control is listed as none. And if you need one ear open to your surroundings at all times, an in-ear pair works against you.
• Best for battery life on calls → Garmin dēzl™ Headset 100. Up to 50 hours of talk time versus 30+ hours of total playtime on the Marshall.
• Best for active noise cancellation → Garmin dēzl™ Headset 100. ANC in the ear cup and boom mic; the Marshall lists no noise control.
• Best for music and portability → Marshall Minor IV True. True wireless in-ear buds with a 40 g charging case and Marshall's signature tuning.
• Best for hands-free navigation → Garmin dēzl™ Headset 100. Pairs with a dēzl OTR navigator for audio prompts and voice commands.
• Best for multipoint device switching → Marshall Minor IV True. Two simultaneous connections and memory for up to 8 paired devices.
• Best for wired fallback → Garmin dēzl™ Headset 100. A 3.5 mm jack is included; the Marshall has no jack at all.
• Best for water resistance → Marshall Minor IV True. IPX4 rated; the Garmin's sheet lists no IP rating.
• Best for customization → Marshall Minor IV True. The app adds EQ tuning, OTA updates, and battery preservation.
• Best for one-ear awareness → Garmin dēzl™ Headset 100. Single-ear design keeps one side of your head open to the environment.
In my opinion, these two products barely compete — they solve different problems, and the right answer depends on which problem is yours. If I spent my day behind the wheel taking calls and wanted navigation prompts in my ear without lifting a hand, I'd buy the Garmin dēzl™ Headset 100. Its 50-hour talk time, dual ANC, and single-ear awareness are exactly what that job demands. If I wanted music, portability, and a distinctive sound in a case that fits in my pocket, I'd buy the Marshall Minor IV True. My honest pick for most readers is the Marshall, simply because true wireless earbuds fit more people's daily lives. But drivers should not talk themselves into earbuds when a purpose-built headset exists.
There's no fixed definition, but the term generally describes headphones built around better materials, more advanced features, and stronger audio engineering than budget models. In this comparison, the Garmin dēzl™ Headset 100 qualifies through its ANC, boom mic, and 50-hour talk time, while the Marshall Minor IV True qualifies through its signature sound, multipoint Bluetooth 5.3, and app-based customization.
There's no single answer, because "best" depends on the job. For hands-free calling and navigation while driving, the Garmin dēzl™ Headset 100 is the stronger fit thanks to its dual ANC and 50-hour talk time. For portable music with a recognizable sound signature, the Marshall Minor IV True is the better match. Decide what you'll actually use them for first.
For the Garmin dēzl™ Headset 100, enable Bluetooth on your phone and pair it as you would any Bluetooth 5 device — you can also pair it with a dēzl OTR navigator for navigation prompts. For the Marshall Minor IV True, open the charging case, hold the button on the bottom until the LED pulses blue, then select MINOR IV from your device's Bluetooth list.
No. The Marshall Minor IV True works on its own, though the Marshall Bluetooth app unlocks EQ adjustment, OTA updates, and battery preservation. The Garmin dēzl™ Headset 100 doesn't require an app either — it pairs directly over Bluetooth, and its deeper integration comes from pairing with a dēzl OTR navigator. Check the current price on Amazon before you commit.
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