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 secure, enclosed in-ear sound with a charging case that keeps your music going for days, choose SGNICS Earbuds; if you need an open-ear design that leaves your ear canal completely unobstructed for cycling and road awareness, choose RSPK Open Ear Headphones.
• SGNICS Earbuds — biggest strength: A full sport package. Ear-hook in-ear fit, 9 hours per charge, a 500mAh case that stretches total playback to 48 hours, USB-C quick charging, IPX6, and Bluetooth 5.3 with noise-canceling mics for calls.
• SGNICS Earbuds — biggest trade-off: In-ear ear hooks seal your canal, which is great for bass and noise blocking but means you're more isolated from traffic and surroundings. It's also a bulkier carry than a bare open-ear band.
• RSPK Open Ear Headphones — biggest strength: The open-ear form factor itself. Nothing plugs your canal, so you stay aware of cars, bikes and people while you run or ride. Bluetooth 5.4, IPX6, and a 2-year warranty round it out.
• RSPK Open Ear Headphones — biggest trade-off: The data sheet is thin. There's no stated playback time, no charging case described, no mic or codec details — so you're buying mostly on the open-ear concept and the warranty.
• Who each pick is for: SGNICS for gym-goers, treadmill runners and anyone who wants sealed, punchy audio plus a long-lasting case. RSPK for cyclists and outdoor runners who put safety and ambient awareness first.
The SGNICS Earbuds (model X13) are built around one idea: keep the buds locked in your ears no matter how hard you move. The ear-hook design is the headline here. Instead of relying on a silicone tip alone to hold position, a soft flexible hook wraps over the top of your ear, so the bud stays put through running, lifting, burpees, whatever. If you've ever had a plain in-ear bud pop out mid-set, that's the problem this solves.
On battery, the numbers are genuinely useful. Each charge gives 9 hours of playback, and the 500mAh case adds up to 48 hours total. The case recharges over USB-C in about 1.5 hours. That math matters for real life: a 45-minute gym session five days a week is under four hours, so you'd be reaching for the charger roughly every two weeks. There's also a 15-level power indicator, so you can see where your charge stands instead of guessing.
For calls, SGNICS lists four microphones with environmental noise canceling, paired with Bluetooth 5.3 for a more stable connection. In a gym with clanging weights and background chatter, that mic array is the feature doing the work. Audio-wise it uses a dynamic driver tuned for deep bass and clear treble. IPX6 handles sweat and rain. You get three eartip sizes (S/M/L), and the buds work with basically anything Bluetooth — iPhone, Android, tablets, the lot.
RSPK Open Ear Headphones: Who It's For
The RSPK Open Ear Headphones (model Q79) take the opposite approach. Nothing enters your ear canal. The driver sits outside your ear and projects sound inward, which is the whole point of the open-ear category — you get your music and your surroundings at the same time. For a cyclist sharing the road with cars, or a runner on a busy path, that ambient awareness is a safety feature, not a compromise.
What the data sheet confirms is solid but limited. Bluetooth 5.4 is the newest version of the two here, which is a small but real point in its favor for connection stability and efficiency. IPX6 waterproofing matches SGNICS, so sweat and rain aren't a concern. The finish is Gunmetal, and it ships with a user manual and a 2-year warranty — the warranty is the standout detail, since it's the kind of coverage that signals the brand expects the hardware to last.
Here's the honest part. The RSPK sheet doesn't list playback time, a charging case, microphone specs, driver type or codec support. That's not automatically bad — plenty of open-ear models keep a lean spec list — but it means you're making the call largely on the form factor and the warranty rather than on verified endurance numbers. If battery life is your top priority, you simply can't compare it here, because RSPK hasn't published a figure to compare. If you want the open-ear experience specifically, that gap may not bother you at all.
Who should buy it: cyclists, outdoor runners, and anyone who wants music while staying fully aware of their environment, and who values a 2-year warranty. Who should skip it: if you want sealed bass, noise isolation, or a documented multi-day battery figure, RSPK doesn't give you those on paper.
Side-by-Side: Which Should You Choose?
• Best for battery confidence → SGNICS Earbuds. 9 hours per charge and 48 hours with the 500mAh case; RSPK states no playback figure.
• Best for charging convenience → SGNICS Earbuds. USB-C with a 1.5-hour case recharge, plus a 15-level power readout.
• Best for road awareness and safety → RSPK Open Ear Headphones. Open-ear means nothing blocks your ear canal.
• Best for connection standard → RSPK Open Ear Headphones. Bluetooth 5.4 versus 5.3 — a minor but real edge.
• Best for long-term peace of mind → RSPK Open Ear Headphones. It's the only one of the two with a stated 2-year warranty.
• Best for sealed, bass-forward gym audio → SGNICS Earbuds. Dynamic driver tuned for deep bass plus passive isolation from the ear tips.
• Best for heavy sweating and rain → a tie. Both are rated IPX6.
• Best for a complete carry kit → SGNICS Earbuds. Case, cable, ear cushions and three eartip sizes are all in the box.
In my opinion, the SGNICS Earbuds are the stronger buy for most people, because they give you documented answers to the questions that actually matter day to day: how long it lasts, how it charges, how it handles calls, and how it stays in your ear. The RSPK Open Ear Headphones win on the one thing SGNICS can't offer — an open ear canal — and that's a genuine reason to pick them if you ride or run near traffic. But with no playback or mic figures published, you're buying on concept and warranty. If safety-first listening is your non-negotiable, go RSPK. Otherwise, I'd take the SGNICS. Either way, check the current price on Amazon before you commit.
For most gym work, yes, in my view. The ear hooks hold the buds securely through movement, IPX6 handles sweat, and the 9-hour-per-charge battery with a 48-hour case means you rarely think about charging. RSPK is the better call only if you want to stay aware of your surroundings while training.
There's no way to say from the specifications. SGNICS lists 9 hours per charge and up to 48 hours with its case. RSPK doesn't publish a playback time, so any comparison would be guesswork. If battery life is your deciding factor, SGNICS is the one with numbers you can plan around.
RSPK, for one clear reason: it's open-ear, so your ear canal stays unblocked and you can hear traffic. SGNICS seals your ears, which is great for immersive audio but works against you on the road. If you ride in traffic, awareness should win.
Both are rated IPX6, so both are built to handle sweat and rain during workouts and daily use. Neither spec claims full submersibility, so keep them out of pools and don't soak them.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.