We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-17 · 7 min read · Independent comparison
If you want a neckband-style pair you can wear around your neck during workouts, choose GZLMMY Neckband Earphones; if you need serious hybrid noise cancelling with long battery life and app-tuned sound, choose TOZO NC9. Both are Bluetooth 5.3 in-ear designs with active noise cancelling, but they solve very different problems. One is built to hang on your neck and stay put through sport. The other is a compact true-wireless earbud system with a charging case and a deep feature set.
• GZLMMY Neckband Earphones biggest strength: a neck-hanging, cable-free-from-your-phone design with a digital power display and an ear-return (ambient awareness) function — made for sports and everyday wear.
• GZLMMY Neckband Earphones biggest trade-off: the battery is rated around 18 hours and it charges over USB rather than USB-C, so it's a simpler, more old-school package than the TOZO.
• TOZO NC9 biggest strength: hybrid active noise cancelling rated to a 45dB reduction depth, 6-mic ENC calling, IPX8 water resistance, and up to 60 hours total playtime with the charging case.
• TOZO NC9 biggest trade-off: it's a true-wireless earbud, so you're managing a charging case and two small buds — more parts to keep track of than a single neckband.
• Who each pick is for: pick GZLMMY if you want a single-piece neckband you can throw on for a run; pick TOZO NC9 if you want the strongest noise cancelling and the most features per ear.
The GZLMMY Neckband Earphones are a single-piece, neck-hanging design. That's the whole point of the format: the electronics and battery sit in a band around your neck, and short cables run up to the in-ear buds. You don't have a case to open, and you don't have two loose buds to lose. For someone who wants to grab a pair, sling them around their neck, and head out the door, that's genuinely convenient. The build is ABS plastic, it weighs about 60 grams, and the total length is roughly 45cm — light enough to forget you're wearing it, with an orange colorway that's easy to spot in a gym bag.
Battery is rated at about 18 hours with a 2-hour charge over USB, and the water resistance is described as life waterproof, which I'd read as splash-and-sweat protection rather than something to swim in. I'd recommend GZLMMY for runners, gym-goers, and anyone who wants a cable-free-from-the-phone, always-on-your-neck pair with button controls and a visible battery readout. I'd skip it if you want the deepest possible noise cancelling, app-based EQ tuning, or a case you can pocket — the neckband format and the 18-hour rating are simply a different set of priorities.
TOZO NC9: Who It's For
The TOZO NC9 is a true-wireless earbud system, and it leans hard into the features people actually shop for. The headline is hybrid active noise cancelling with a maximum reduction depth of 45dB — that's a real, meaningful spec for blocking engine drone, office chatter, or a bus. On top of that there's a 6-microphone ENC setup that filters background sound so your voice comes through on calls, plus a Transparency Mode so you can hear announcements or traffic without pulling the buds out.
Sound is handled by 10mm dynamic drivers paired with the brand's OrigX Acoustic 2.0 tuning, and the app gives you 32 EQ options to shape bass and style, plus a sharing zone where you can post your custom EQ. If you like fiddling with sound, that's a lot of room to play. The buds also support low-latency performance (60ms), which matters for gaming and video sync, and the Bluetooth range is listed at 20 meters — comfortable for moving around a home or office.
Battery is where the NC9 pulls away: up to 60 hours total with ANC off and 40 hours with ANC on, via the charging case, with 14 hours (ANC off) or 10 hours (ANC on) in a single use, and a 1.5-hour charge time over USB-C. The case has an LED display so you can see remaining power. The fit is ergonomic with six sizes of replaceable earcaps, and the enclosure mixes ABS and polycarbonate, with IPX8 water resistance — the highest rating in this comparison, meaning it handles sweat, rain, and splashes with confidence. Controls are touch-based and app-based.
Side-by-Side: Which Should You Choose?
• Best for noise cancelling → TOZO NC9. It's hybrid ANC rated to a 45dB reduction depth; GZLMMY lists active noise cancellation but without a comparable depth figure.
• Best for total battery life → TOZO NC9. Up to 60 hours with the case (40 with ANC on) versus roughly 18 hours on the GZLMMY.
• Best for calls → TOZO NC9. The 6-mic ENC setup is purpose-built for filtering background noise on calls; GZLMMY relies on its ear-return function for communication.
• Best for water and sweat → TOZO NC9. IPX8 versus GZLMMY's life-waterproof rating.
• Best for a single-piece, no-case design → GZLMMY Neckband Earphones. Nothing to dock, nothing to lose, and it hangs around your neck between uses.
• Best for physical buttons and a quick battery check → GZLMMY Neckband Earphones. Push-button control and a digital power display, with no app required.
• Best for sound customization → TOZO NC9. 32 EQ options and a sharing zone in the app, versus a fixed tuning on the GZLMMY.
• Best for gaming and video sync → TOZO NC9. A 60ms latency figure is listed; GZLMMY doesn't publish a latency spec, though it does support karaoke and live-streaming.
My Verdict
Both are in-ear and both resist sweat, but the NC9 carries an IPX8 rating, which is the stronger water-resistance claim here. The GZLMMY is described as life waterproof. For heavy sweat or rain, I'd lean TOZO NC9.
TOZO NC9, clearly. It's rated up to 60 hours total with the charging case (40 with ANC on) and 14 hours per single use with ANC off. The GZLMMY is rated around 18 hours and charges over USB.
Yes. It supports Bluetooth calling and includes an ear-return function that lets surrounding sound back in, which helps with awareness and quick conversations. It doesn't list a dedicated multi-mic ENC system like the NC9.
No, but the app is where much of the value lives. It unlocks the 32 EQ options, noise-cancellation mode switching, and firmware updates. The GZLMMY, by contrast, is controlled entirely with on-board push buttons and needs no app.
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