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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 7 min read · Independent comparison
If you want a small, light, true-wireless pair that disappears in your ears and still gives you a full day of listening, choose JVC Compact; if you need marathon battery life, a neckband you never have to hunt for, and a screen that shows you the charge, choose GZLMMY Color Screen.
• JVC Compact — biggest strength: Tiny Gumy Mini true-wireless buds with 23 hours of total playtime from the charging case, three selectable sound modes, and IPX4 water resistance.
• JVC Compact — biggest trade-off: The buds themselves are small, so the case has to come along for the full 23 hours, and there is no screen or card slot to fall back on.
• GZLMMY Color Screen — biggest strength: A neckband design with a 300mAh battery rated for 100 hours of music playback, 60-day standby, Bluetooth 5.4, and a TF card slot for offline listening.
• GZLMMY Color Screen — biggest trade-off: It is a collar-style neckband, not pocket-sized buds, and the TF card needed for offline mode is not included.
• Who each is for: JVC Compact suits commuters and casual listeners who want minimal, cable-free earbuds; GZLMMY Color Screen suits runners, hikers and long-shift workers who want maximum runtime and a wearable band.
The JVC Compact is a true-wireless pair in the classic sense: two small buds that sit in your ears with no wire between them. The selling point here is the combination of size and stamina. JVC rates the earbuds at 23 hours of average battery life, with the included charging case accounting for 22 of those hours. That means a single charge gets you through a commute, a workout and an afternoon of calls, and the case refills them several times over before you need a wall outlet.
Sound-wise you get a dynamic driver with a 20 Hz to 20,000 Hz frequency range and 16-ohm impedance, plus three listening modes — normal, bass and clear — that you switch depending on whether you want punch, detail or a flat default. Bluetooth 5.1 with a 10-meter range is the connection standard, and the buds auto-connect the moment you pull them out of the case, which is the kind of small convenience that matters when you are juggling a bag and a coffee. Touch sensors on the buds handle volume and playback, and they work with voice assistants.
The fit is where this one earns its name. Silicone enclosures, in-ear placement and a bud shape aimed at comfort rather than bulk. IPX4 water resistance covers sweat and light rain, so a run or a rainy walk is fine, though I would not submerge them. Who should buy it? Someone who wants earbuds they forget they are wearing, who values a genuinely small footprint, and who likes the idea of three sound profiles without fiddling with an app. Who should skip it? Anyone who hates charging cases, anyone who wants a screen or an offline music mode, and anyone whose priority is the absolute longest runtime per charge rather than per case.
The GZLMMY Color Screen takes the opposite approach. It is a neckband — a bendable silicone collar that rests around your neck with the earpieces hanging on magnetic ends. That design choice is the whole story. Because the battery sits in the collar instead of in your ears, GZLMMY can fit a 300mAh cell and rate it for 100 hours of music playback at 30% volume, with 720 hours (about 60 days) of standby. A full recharge takes 1.5 hours over Type-C.
The "Color Screen" in the name refers to the LED display that shows your battery status, so you are never guessing whether you have power left before a long session. Bluetooth 5.4 is the newer standard here, and GZLMMY claims faster pairing, a more stable link and better transmission quality than older versions, with a 15-meter range. Call quality gets its own treatment too: intelligent voice noise reduction aimed at keeping your voice clear in loud places, and the noise control is listed as active noise cancellation rather than simple isolation.
Then there is the TF card slot. If you drop in a memory card — up to 8GB, and note it is not included — the earphones switch into MP3-player mode and play straight from the card, no phone required. That is a genuinely useful feature for the gym, a run without pockets, or anywhere you want to leave the phone behind. IPX5 waterproofing is a step above splash-resistance, rated for rain and sweat during outdoor activity, and the half-in-ear, lightweight build is aimed at people who wear earphones for hours at a time. Controls are physical buttons rather than touch, which some people far prefer when they are moving.
Who should buy it? Long-distance runners, cyclists, warehouse and delivery workers, hikers, and anyone who has ever had a bud fall out on a trail. The collar stays put, the magnets keep the earpieces tidy, and the runtime is measured in days, not hours. Who should skip it? If you want something that vanishes into a pocket, a neckband will always feel like a piece of gear you are wearing rather than carrying.
Side-by-Side: Which Should You Choose?
• Best for a truly wireless, pocketable fit → JVC Compact. No collar, no cable, no bulk — pull them out of the case and they connect automatically.
• Best for workouts and rain → GZLMMY Color Screen. IPX5 with a secure neckband beats IPX4 on loose buds when you are sweating hard or caught outside.
• Best for casual daily listening → JVC Compact. Three sound modes, touch controls and a comfortable silicone in-ear fit cover most commutes, calls and playlists.
• Best for leaving your phone behind → GZLMMY Color Screen. The TF card slot turns it into a standalone player, provided you supply the card.
• Best for calls in noisy places → GZLMMY Color Screen. Voice-call noise reduction and active noise cancellation are explicitly part of the spec sheet; the JVC relies on sound isolation only.
• Best for newer Bluetooth → GZLMMY Color Screen. Bluetooth 5.4 with a 15-meter range is a generation ahead of the JVC's 5.1 at 10 meters.
• Best for battery visibility → GZLMMY Color Screen. The LED color screen tells you your charge level; the JVC gives you no such readout.
In my opinion, the GZLMMY Color Screen is the better buy for most people shopping on the strength of long battery life — which is the whole point of this comparison. Its 100-hour playback, 60-day standby, IPX5 rating, TF card mode and battery screen make it the more capable tool for anyone who wears earphones for hours and hates charging.
I would pick the JVC Compact only if true-wireless freedom is non-negotiable and 23 hours from the case genuinely covers your day. Both are solid at what they set out to do, but the GZLMMY simply does more of the things a long-runtime shopper cares about.
FAQ
Between these two, the GZLMMY Color Screen again leads at 100 hours, though it is a neckband rather than a pair of standalone buds. The JVC Compact is the true-wireless option at 23 hours total with the case. True-wireless buds are limited by how much battery can fit in each earpiece, which is why the collar-style design lasts longer.
Two different things matter here: playtime per charge and the usable life of the battery. The JVC Compact is rated for 23 hours of average battery life and the GZLMMY for 100 hours, both with a 1-year warranty. Actual longevity depends on how often you drain and recharge them, so treating the battery well matters more than the headline number.
Only if you want the offline MP3 mode. The earphones support a TF card up to 8GB, but the card is not included in the package — you get the earphones, a Type-C cable and a user manual. Without a card, it works as a normal Bluetooth neckband with the same 100-hour playback.
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