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If you want one device that flips between private over-ear headphones and a shareable wireless speaker, choose MHTEC 2-in-1; if you need earbuds that stay locked in your ears through sweat, rain and long workouts, choose HAOYUYAN Earbuds.
• MHTEC 2-in-1 – biggest strength: A genuine two-in-one design. Rotate the earcups and a pair of over-ear headphones becomes a Bluetooth speaker, so you can go from private listening to sharing a track without reaching for a second device.
• MHTEC 2-in-1 – biggest trade-off: It's a full-size over-ear headphone at 230 g. That's fine at a desk, awkward on a run, and it has no water-resistance rating at all.
• HAOYUYAN Earbuds – biggest strength: Endurance and sweat tolerance. An 8-hour single-charge life, a charging case that stretches total listening far beyond that, an LED readout on the case, and an IPX7 waterproof rating.
• HAOYUYAN Earbuds – biggest trade-off: Fewer ways to listen. There's no wired fallback — no 3.5 mm jack — and no speaker mode, so everything runs through Bluetooth only.
• Who each is for: MHTEC 2-in-1 suits desk workers, students, travellers and anyone who wants to share music out loud. HAOYUYAN Earbuds suit runners, gym-goers and people who want audio that disappears into their ears.
The MHTEC 2-in-1 does something most headphones simply don't attempt. In headphone mode it's a conventional over-ear pair with dual 40 mm dynamic drivers, memory foam padding and protein leather cushions. Rotate the earcups and the same drivers push sound outward as a Bluetooth speaker. That single trick is the whole reason to consider it. It means one item in your bag covers both your private listening and the "put something on for everyone" moment — a hotel room, a picnic table, a dorm desk.
Sound shaping is more flexible than you'd expect at this tier. There are three EQ modes — Bass Boost, Balanced and High Definition — so you can push low end for workouts and hip-hop, or flatten things out for podcasts and calls. The spec sheet lists a 20 Hz–20,000 Hz frequency range, 32 ohm impedance and 98 dB sensitivity, which describes an easy-to-drive headphone that doesn't demand a headphone amp. Bluetooth 5.3 handles the wireless link with a stated range of about 10 metres / 33 feet, and there's a 3.5 mm aux cable in the box for wired listening when you want it.
Buy it if you want one device for desk listening, calls, travel and occasional group playback, and you like the idea of EQ modes and offline TF card playback. Skip it if you need something for running, heavy sweating or rain — there's no waterproofing here, and 230 g of over-ear headphone is not what you want bouncing on your head at pace.
HAOYUYAN Earbuds: Who It's For
The HAOYUYAN Earbuds take the opposite approach: specialise hard in movement. These are in-ear buds with elastic soft ear hooks that wrap over the top of your ear, which is the classic shape for staying put during running and lifting. Three sizes of ear tips are included, so you can dial in a seal rather than accepting whatever fit the box gives you. The housing is plastic in a gray-black finish, and at in-ear scale it weighs next to nothing compared with an over-ear headphone.
Battery is where these pull clearly ahead. HAOYUYAN rates a single charge at up to 8 hours of continuous playback at roughly 50–60% volume, and the charging case adds enough capacity for a total figure in the region of 90 hours. There's an external digital LED display on the case that shows the remaining charge without opening the lid — a small thing that makes a real difference when you're packing a bag at 6 a.m. and don't want to gamble on a dead pair of buds. Charging is over USB-C.
Water resistance is the other headline. An IPX7 rating means these are built to shrug off sweat and splashes, which is exactly the failure mode that kills ordinary earbuds in a gym bag. Sound comes from a 14.2 mm dynamic driver — a large driver for an in-ear bud — paired with passive noise cancellation from the sealed fit, plus a built-in microphone for calls. Touch controls on the buds handle playback, volume and call management, and Bluetooth 5.3 gives fast pairing: open the case and they reconnect automatically after the first setup. They'll pair with phones, Android, Windows, laptops, tablets and smart TVs.
The compromises are worth naming. There's no headphone jack, so if the battery dies you're silent until you charge — there's no wired backup. Passive noise cancellation depends entirely on how well the tips seal, which is a fit issue rather than a feature. And the warranty is listed at 90 days from the manufacturer, which is shorter than the MHTEC's terms.
Side-by-Side: Which Should You Choose?
• Best for sharing music with others → MHTEC 2-in-1. The rotating earcup speaker mode has no equivalent on the HAOYUYAN.
• Best for battery endurance → HAOYUYAN Earbuds. Around 8 hours per charge plus a large case, versus roughly 18 hours total on the MHTEC in headphone mode.
• Best for running, gym and sweaty workouts → HAOYUYAN Earbuds. IPX7 waterproofing and ear hooks versus no water rating and a 230 g over-ear frame.
• Best for long desk, study or work sessions → MHTEC 2-in-1. Memory foam cushions, an adjustable headband and over-ear comfort are built for hours of sitting.
• Best for calls in a noisy place → MHTEC 2-in-1, in my opinion, because the over-ear cup physically blocks more ambient sound before the microphone has to work.
• Best for offline listening without a phone → MHTEC 2-in-1. The TF card slot plays music with no paired device at all.
• Best if you might want wired audio → MHTEC 2-in-1. It includes a 3.5 mm aux cable; the HAOYUYAN has no jack.
• Best for a gift → MHTEC 2-in-1. Gift-ready retail packaging, a carry pouch and a two-in-one concept that reads as a novelty worth opening.
If I had to pick one, I'd take the MHTEC 2-in-1. The rotating speaker mode genuinely changes how I'd use it — desk listening, calls, travel, then flip it around and share a track — and the TF card slot plus aux cable mean it keeps working when Bluetooth or your phone doesn't. The HAOYUYAN is the better specialist if your life revolves around training, and its IPX7 rating and case battery are real advantages I wouldn't dismiss. But as a single do-more device, the MHTEC covers more of my day. Check the current price on Amazon before deciding, since value shifts fast in this category.
FAQ
No. The MHTEC has no water-resistance rating and weighs 230 g, which is a lot to keep steady at pace. The HAOYUYAN is IPX7 rated with ear hooks and three tip sizes, so it's the clear pick for running and gym work.
On the stated figures, yes. HAOYUYAN lists up to 8 hours per charge with a charging case adding far more, while the MHTEC lists roughly 18 hours in headphone mode — and less in speaker mode, since the drivers work harder.
No. There's no headphone jack, so they're Bluetooth-only. The MHTEC 2-in-1 is more flexible here — it includes a 3.5 mm aux cable and a TF card slot for playback without a phone.
The MHTEC 2-in-1, in my opinion. It arrives in gift-ready packaging with a carry pouch, and the headphones-to-speaker rotation is a feature people immediately understand and want to try. The HAOYUYAN is the more practical gift for someone who trains seriously.
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