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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-21 · 6 min read · Independent comparison
If you want marathon battery life with a color screen and offline music playback, choose GZLMMY Color Screen; if you need a lighter, faster-charging neckband tuned for calls and workouts with a longer warranty, choose JL&MI Neckband.
• GZLMMY Color Screen — biggest strength: a 300mAh battery rated for 100 hours of music playback and up to 720 hours (60 days) of standby, plus a TF card slot for phone-free listening.
• JL&MI Neckband — biggest strength: a 13mm DLC driver with a low 0.3ms latency figure, ENC noise cancellation, and a 2-year manufacturer warranty.
• JL&MI Neckband — biggest trade-off: a shorter 80-hour playtime rating and a slower 2.5-hour charge, with a 10-meter Bluetooth range.
• Who GZLMMY is for: long-haul listeners who want maximum runtime, offline MP3-style playback, and a bendable memory-silicone collar.
• Who JL&MI is for: call-heavy users, gym-goers, and buyers who value a longer warranty and a fuller accessory kit.
The GZLMMY Color Screen is built around one idea: keep the music going for as long as humanly possible. Its 300mAh battery is rated for 100 hours of music playback at 30% volume and a striking 720 hours of standby, which works out to roughly 60 days. In practice, that means someone who listens an hour or two a day might go weeks between charges. When you do need to top it up, Type-C fast charging gets you back to full in about 1.5 hours.
The second thing that sets it apart is the TF card slot. You can insert a card (up to 8GB, sold separately) and listen without pairing to anything — basically turning the neckband into a standalone MP3 player. For runners who don't want to carry a phone, or anyone who wants a backup when their handset dies, that's a genuinely useful trick that most neckbands skip. Bluetooth 5.4 handles the wireless side, with a 15-meter transmission distance and support for phones, tablets, laptops, and game consoles.
Comfort-wise, GZLMMY uses a memory silicone collar that bends without deforming, half in-ear tips, and magnetic earbuds that snap together to prevent tangling. The IPX5 rating covers rain and sweat, and an LED battery display lets you check charge at a glance. The color screen is the headline feature for quick status reading.
Who should buy it? In my opinion, this is for the listener who hates charging — commuters, travelers, and people who want offline playback as a backup. Who should skip it? If you mainly take calls in noisy places and want explicit environmental noise cancellation with a longer warranty, the JL&MI's ENC setup and 2-year coverage may suit you better. GZLMMY lists active noise cancellation for calls, but its spec sheet emphasizes voice-call noise reduction rather than the broader ENC labeling JL&MI uses.
The JL&MI Neckband takes a different angle. It's rated for 80 hours of continuous playback with 1,000 hours of standby, and it charges over Type-C in about 2.5 hours. That's less runtime than the GZLMMY on paper, but still enough for days of normal use — and the trade-off buys you other things.
Sound is where JL&MI leans in. It uses a 13mm DLC driver with a 32-ohm impedance, 105dB sensitivity, and a 20Hz–20kHz frequency range. The spec sheet also lists a 0.3-millisecond audio latency figure, which matters if you watch video or game and want audio to stay locked to the picture. For podcasts, music, and calls, the tuning is described as balanced rather than bass-heavy.
The design is a magnetic U-shape neckband in ABS and liquid silicone. It's aimed at gym and fashion use, and the package is generous: a storage bag, three pairs of ear tips, and a Type-C cable. There's also a silver-gray carrying case listed. Bluetooth 5.4 handles pairing with a 10-meter range, and ENC (environmental noise cancellation) works to cut background noise on calls. IPX5 sweat resistance covers workouts and weather.
Who should buy it? I'd point this at gym-goers, people who live on calls, and anyone who wants a longer warranty — JL&MI backs it with 2 years versus GZLMMY's 1 year. Who should skip it? If your priority is squeezing out the absolute maximum hours per charge or listening without a phone via a memory card, GZLMMY wins that specific contest.
Side-by-Side: Which Should You Choose?
• Best for call clarity → JL&MI Neckband. Its ENC (environmental noise cancellation) is explicitly listed, alongside a mic and stable Bluetooth 5.4 pairing.
• Best for offline listening → GZLMMY Color Screen. The TF card slot (up to 8GB) lets you play music with no phone at all.
• Best for workouts → JL&MI Neckband. Magnetic U-shape fit, IPX5 sweat resistance, and a Gym/Fashion style tag make it the sportier pick.
• Best for low-latency video and gaming → JL&MI Neckband. A 0.3ms audio latency figure is called out; GZLMMY doesn't list one.
• Best accessory kit → JL&MI Neckband. Storage bag, three pairs of ear tips, and a carrying case come in the box.
• Best for fast top-ups → GZLMMY Color Screen. 1.5-hour charging versus JL&MI's 2.5 hours.
• Best for warranty peace of mind → JL&MI Neckband. A 2-year manufacturer warranty against GZLMMY's 1 year.
• Best for wider roaming range → GZLMMY Color Screen. 15 meters of Bluetooth range versus 10 meters.
If I had to pick one, I'd take the JL&MI Neckband — the 13mm DLC driver, ENC call handling, 0.3ms latency figure, fuller accessory kit, and 2-year warranty make it the more well-rounded everyday headphone for me. That said, the GZLMMY Color Screen is the better call if raw battery life and TF-card offline playback are your top priorities. Both are IPX5 and Bluetooth 5.4, so the real decision comes down to whether you value runtime and standalone playback (GZLMMY) or call quality, low latency, and warranty length (JL&MI). Check the current price on Amazon for both before you decide.
GZLMMY rates 100 hours of music playback at 30% volume and 720 hours of standby. JL&MI rates 80 hours of playback and 1,000 hours of standby. GZLMMY wins on playtime; JL&MI wins on standby.
Yes. It supports TF card playback (up to 8GB, card not included), so you can listen like an MP3 player. The JL&MI Neckband relies on Bluetooth.
Both are IPX5 sweat-resistant. JL&MI adds a magnetic U-shape fit and is styled for gym use, while GZLMMY uses a bendable memory silicone collar and magnetic earbuds.
JL&MI offers a 2-year manufacturer warranty; GZLMMY offers 1 year. If long-term coverage matters to you, JL&MI is the safer bet.
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