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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
• LOBKIN Open Ear Headphones — biggest strength: Built-in 8GB storage for roughly 2000 songs plus IPX7 waterproofing, so you can run without your phone and rinse the headphones afterwards.
• LOBKIN Open Ear Headphones — biggest trade-off: The ear-hook, all-in-one shape is bulkier than a pocket case design, and it charges over a magnetic port rather than USB-C.
• TRANSFORMERS Open Ear Headphones — biggest strength: Large 14.2mm dynamic drivers, Bluetooth 5.4 with multi-point, and a compact charging case with a silicone lanyard.
• TRANSFORMERS Open Ear Headphones — biggest trade-off: IPX5 rather than IPX7, no onboard music storage, and a shorter 1.5-hour charge spec with no rated playtime listed.
• Who each pick is for: LOBKIN for runners, cyclists and swimmers-adjacent sweaters who want music without a phone; TRANSFORMERS for commuters, desk workers and casual gym-goers who carry a phone anyway.
The headline feature here is the built-in 8GB of storage. LOBKIN estimates that as room for about 2000 songs, and the practical effect is that these are two products in one: a Bluetooth headset and a standalone MP3 player. For a runner, that is a real shift in how you train. No armband, no phone bouncing in a pocket, no deciding whether to risk your handset in the rain. Load your music once, and the headphones carry it.
Water protection is the second thing that stands out. IPX7 means they shrug off sweat and rain and can be rinsed clean after a session, and LOBKIN uses a corrosion-resistant magnetic charging port specifically to keep that moisture out over time. Battery is rated at up to 10 hours of continuous play on a charge that takes about 2 hours, which comfortably covers a long ride, a double workout day, or a full workday of background listening.
Connectivity is Bluetooth 6.0 with dual-device pairing, so a laptop and a phone can both stay connected and calls cut in automatically. There is also ENC noise reduction on the microphone for calls in loud places. Controls are physical buttons, which many people prefer with sweaty hands.
Buy LOBKIN if you exercise outdoors, hate carrying a phone, sweat heavily, or get caught in the rain. Skip it if you want a tiny case that vanishes into a pocket, or you are mainly listening at a desk where the all-in-one frame and 8GB of storage are features you will never use.
TRANSFORMERS Open Ear Headphones: Who It's For
The TRANSFORMERS set takes the opposite approach: a compact true-wireless pair that lives in a charging case. The rounded design is small enough to slip into a pocket or bag, and the included silicone lanyard lets you clip the case to a belt loop or backpack so it does not get lost. If you have ever dug through a bag looking for a loose earbud, that lanyard is a small but genuinely useful detail.
Audio hardware is the strong point on paper. Each side uses a 14.2mm dynamic driver — noticeably larger than the 11mm driver in the LOBKIN — tuned for open-ear wear with a 20Hz–20,000Hz range. Bigger drivers generally mean more low-end presence, and TRANSFORMERS is explicit that the tuning favors clear vocals and satisfying bass without sealing your ear canal. Bluetooth 5.4 handles the connection, with multi-point pairing for two devices at once, so hopping between a phone and a Windows laptop is meant to be seamless.
The fit relies on soft, flexible silicone ear hooks that hold the buds in place during high-impact movement. Water protection is IPX5 via a nano-coating, which covers sweat, rain and moisture during workouts but is a step below full immersion — fine for running in a drizzle, not something to rinse under a tap or swim in. Charging takes about 1.5 hours through a Type-C cable.
Controls are touch-based, which keeps the surface clean and button-free. Some people love that; others find touch controls fiddly with wet or gloved fingers. The warranty is listed at 2 years, longer than LOBKIN's 12 months.
Side-by-Side: Which Should You Choose?
• Best for phone-free workouts → LOBKIN Open Ear Headphones. 8GB of onboard storage plays roughly 2000 songs with no phone in range.
• Best for battery spec → LOBKIN Open Ear Headphones. Up to 10 hours of playtime on a 2-hour charge; TRANSFORMERS does not publish a playtime figure.
• Best for water and sweat → LOBKIN Open Ear Headphones. IPX7 beats IPX5, and the magnetic charging port is designed to resist corrosion from moisture.
• Best for bass and driver size → TRANSFORMERS Open Ear Headphones. 14.2mm dynamic drivers versus 11mm.
• Best for portability → TRANSFORMERS Open Ear Headphones. A compact charging case with a lanyard clip versus an all-in-one ear-hook frame.
• Best for call clarity in noise → LOBKIN Open Ear Headphones. ENC microphone noise reduction is a listed feature; TRANSFORMERS does not spec one.
• Best for control feel → depends on taste. LOBKIN uses push buttons; TRANSFORMERS uses touch.
• Best for warranty length → TRANSFORMERS Open Ear Headphones. 2 years listed against LOBKIN's 12 months.
In my opinion, the LOBKIN Open Ear Headphones are the more useful pair for the person most likely to buy open-ear headphones: someone who runs, rides or trains outdoors. The combination of 8GB of storage, IPX7 waterproofing, a 10-hour battery and ENC call handling solves the two problems that actually annoy athletes — carrying a phone and killing headphones with sweat. I would pick the TRANSFORMERS set instead if my listening is mostly indoors and phone-tethered, where the 14.2mm drivers, pocketable case and 2-year warranty matter more than ruggedness, and where I would never use onboard storage anyway. If you are torn, buy for your worst-case day, not your average one. Check the current price on Amazon before deciding, since that is the one variable this page cannot cover.
FAQ
No. The TRANSFORMERS set is a Bluetooth-only pair, so it needs a connected phone, tablet or computer to play audio. The LOBKIN headphones are the ones with onboard 8GB storage.
The LOBKIN set is IPX7 rated, so it handles rain and even a rinse. The TRANSFORMERS set is IPX5 — fine for sweat and light rain, but I would not submerge it or wash it under a tap.
The LOBKIN headphones list ENC call noise reduction, which is designed to keep your voice clear in noisy places. The TRANSFORMERS set lists multi-point Bluetooth 5.4 for fast device switching, but no dedicated call noise reduction. Both support dual-device pairing.
Both sit in the affordable open-ear category, but I cannot quote figures here. Use the price button on this page to check the current price on Amazon for each, then weigh it against the features you will actually use — storage and waterproofing on one side, driver size and a compact case on the other.
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