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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want richer sound, longer total battery life with a charging case, and smart extras like real-time translation, choose Anker Soundcore AeroFit 2; if you need maximum sweat and rain protection for hard outdoor training, choose Plufunex Open Ear Headphones.
• Anker Soundcore AeroFit 2 — biggest strength: A feature-rich open-ear package with 20 mm × 11.5 mm racetrack drivers, BassTurbo acoustics, LDAC Hi-Res audio, up to 42 hours total with the case, and real-time translation across 100 languages.
• Anker Soundcore AeroFit 2 — biggest trade-off: IP55 is fine for sweat and light rain but not built for heavy water exposure, and there's no noise control or ANC.
• Plufunex Open Ear Headphones — biggest strength: An IP68 sweatproof, dust-proof build with a 32 g lightweight frame, physical buttons that work with sweaty hands, and Bluetooth 6.0 with multipoint.
• Plufunex Open Ear Headphones — biggest trade-off: No charging case, a bone-conduction driver with only 13 hours per charge, and a 2-hour charge time.
• Pick Anker Soundcore AeroFit 2 if you want the more complete everyday headphone — better audio tech, a case, translation, and adjustable fit.
• Pick Plufunex Open Ear Headphones if you're a runner or cyclist who prioritizes water resistance, low weight, and glove-friendly controls above all.
The AeroFit 2 is the more ambitious of the two. Anker built it around a double-curved, non-invasive shape with soft materials, and then added a genuinely useful twist: 4-level adjustable ear hooks that the brand says fit over 99% of ear shapes and sizes. In my opinion, that adjustability is the real headline here, because open-ear headphones live or die on fit — if the hook doesn't sit right, the sound floats away from your ear and you get thin, distant audio. Being able to dial in four positions is a meaningful hedge against that problem.
On the audio side, the numbers back up the ambition. Two racetrack drivers (20 mm × 11.5 mm) plus BassTurbo acoustics, a 20 Hz–40,000 Hz frequency range, 16 ohm impedance, and support for Bluetooth 5.4 with LDAC. That's a Hi-Res-capable wireless setup, which is unusual at this end of the open-ear category. Directional acoustic tech aims sound toward your ear to keep it private and reduce leakage — a real concern when you're on a call in a quiet office or on a train.
Battery is the other standout: up to 10 hours per charge, 42 hours total with the case, and a 1-hour charge time. The case itself holds 750 mAh and supports wireless charging, so you can drop it on a pad instead of hunting for a cable. Add IP55, AI clear calls, touch controls, and a real-time translation feature covering 100 languages (with the caveat that you need the soundcore app at version 3.8.7 or later and updated firmware), and you have a headphone that's trying to do a lot.
Who should skip it: anyone who trains hard in rain, on dusty trails, or in heavy sweat conditions. IP55 is a splash-and-sweat rating, not a submersion one, and there's no noise cancellation if you wanted to block the world out.
Plufunex Open Ear Headphones: Who It's For
The Plufunex pair takes the opposite approach. Instead of chasing audio specs, it chases durability and low weight. At 32 g, it's built to disappear on your head during long sessions, and the ABS-and-silicone frame with a hook shape is designed to stay put through climbs, descents, and corners. If you've ever had a headphone shift mid-run, you know why that matters.
The standout spec is IP68. That's the highest dust and water resistance rating in this comparison by a wide margin — it's designed to shrug off sweat, rain, and dust, though the brand is explicit that it isn't for underwater swimming or water immersion. For runners, cyclists, and gym-goers, IP68 is the difference between a headphone you baby and one you just wear.
Connectivity is also forward-looking: Bluetooth 6.0 with multipoint, so you can pair two devices and switch between them, plus a stated 33-foot range. A 10-minute quick charge buys extra listening time when you're rushing out the door, and the full charge gives up to 13 hours — but note the 2-hour charge time, which is slower than I'd like.
Here's the honest trade-off. The driver is a 16 mm bone-conduction unit with 8 ohm impedance, 91 dB sensitivity, and a 20 Hz–20 kHz range. Bone conduction sends vibration through your cheekbones rather than firing sound into your ear canal. It's excellent for awareness and safety — you hear traffic, conversations, and ambient noise clearly — but in my opinion it won't deliver the bass depth or treble sparkle of a conventional dynamic driver. There's also no charging case, so 13 hours is the ceiling, not a stepping stone to 42.
Who should buy it: runners, cyclists, hikers, and gym users who train outdoors in unpredictable weather and want maximum environmental awareness plus buttons that work with sweaty hands.
Side-by-Side: Which Should You Choose?
• Best sound quality → Anker Soundcore AeroFit 2. Racetrack dynamic drivers, BassTurbo, LDAC, and a 20 Hz–40,000 Hz range versus bone conduction at 20 Hz–20 kHz.
• Best for heavy sweat and rain → Plufunex Open Ear Headphones. IP68 beats IP55 for hard outdoor training.
• Best total battery life → Anker Soundcore AeroFit 2. 42 hours with the case versus 13 hours on a single charge.
• Best for long single sessions → Plufunex Open Ear Headphones. 13 continuous hours beats the AeroFit 2's 10 per charge.
• Best for commuting and calls → Anker Soundcore AeroFit 2. AI clear calls, directional audio for privacy, touch controls, and a case that wirelessly charges.
• Best for gloves and sweaty hands → Plufunex Open Ear Headphones. Physical buttons give instant tactile feedback where touch controls can struggle.
• Best for travel extras → Anker Soundcore AeroFit 2. Real-time translation across 100 languages is a genuinely unusual feature.
• Best for the lightest possible wear → Plufunex Open Ear Headphones. 32 g versus an 85 g total weight for the AeroFit 2 setup.
If I were buying for myself, I'd go with the Anker Soundcore AeroFit 2. In my opinion it's the more versatile headphone: better drivers, Hi-Res LDAC support, a 42-hour case, adjustable ear hooks, and translation make it the one that works across commuting, calls, and casual listening. The IP55 rating is the compromise I'd accept, since most of my listening isn't in a downpour.
That said, if your priority is surviving brutal workouts and staying aware of traffic, the Plufunex is the smarter buy. IP68, 32 g, and physical buttons are exactly what outdoor athletes need. Two different jobs, two different winners — pick the one that matches your week.
how to open ear headphones work
Open-ear headphones sit outside your ear canal rather than inside it. The AeroFit 2 uses directional acoustic tech to aim sound toward your ear while minimizing leakage, while the Plufunex uses a bone-conduction driver that vibrates against your cheekbone. Both let you hear your audio and your surroundings at once.
how to wear open ear headphones
You hook the earpiece over the top of your ear so the speaker rests just outside the canal. The AeroFit 2 has 4-level adjustable ear hooks to tailor the fit, and the Plufunex uses a hook shape with a 32 g lightweight frame designed to stay stable during movement. Neither goes inside your ear.
how to use open ear headphones
Pair them over Bluetooth — Bluetooth 5.4 on the AeroFit 2 and Bluetooth 6.0 with multipoint on the Plufunex — then control playback by touch on the AeroFit 2 or physical buttons on the Plufunex. Charge via the AeroFit 2's wireless charging case or the Plufunex's cable.
how to open ear headphones compare for running and rain
For running in rain and heavy sweat, the Plufunex's IP68 rating and 32 g weight give it the edge, with physical buttons that work with sweaty hands. The AeroFit 2 offers IP55, so it handles sweat and light splashes but isn't built for sustained water exposure. Check the current price on Amazon for each before deciding.
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