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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a compact, feature-dense set of true wireless earbuds with hi-res codec support and a customizable app experience, choose EarFun Air 2; if you need long-wear over-ear headphones with a wired fallback, 60 hours of battery and a foldable design, choose Belkin SoundForm Surround.
• EarFun Air 2 — biggest strength: LDAC and Hi-Res Audio support from 10mm wool composite drivers, plus app-level EQ and control customization in a 4.5g-per-bud in-ear design.
• EarFun Air 2 — biggest trade-off: No wired option at all (no headphone jack), and enabling LDAC cuts total playtime from 40 hours to 23 hours and can affect stability, especially with multipoint.
• Belkin SoundForm Surround — biggest strength: 60 hours of battery life, Bluetooth 5.4, and a 3.5mm AUX cable in the box so it still works when the battery is empty.
• Belkin SoundForm Surround — biggest trade-off: It's a full-size over-ear headphone — bulkier to carry than a charging case, and it skips the codec/app-tuning layer that the EarFun offers.
• Get the EarFun Air 2 if you want pocketable earbuds for commuting, workouts, calls on the move, and you stream from an Android device that supports LDAC.
• Get the Belkin SoundForm Surround if you want one pair of headphones to wear for hours at a desk, on a plane or around the house, and you value battery life and a wired backup over portability.
The EarFun Air 2 is built around a simple idea: squeeze serious audio hardware into something you forget you're wearing. Each bud weighs 4.5g, and the angular in-ear shape is paired with four sizes of ear tips, so the fit is meant to be dialed in rather than accepted as-is. Inside, 10mm wool composite dynamic drivers handle the sound, and LDAC plus Hi-Res Audio certification means the buds can accept roughly three times more data than a standard Bluetooth stream. That matters if you're on Android and your music service serves up high-bitrate files — the detail survives the wireless trip. Just know the trade-off: LDAC isn't compatible with iOS devices, so iPhone owners won't get that part of the package.
Buy it if you want earbuds for the gym, the commute and calls on the go, you're on Android, and you like the idea of tuning your own sound. Skip it if you're an iPhone user who wanted LDAC, you need a wired option, or you'd rather have over-ear cups than something sitting in your ear canal for hours.
Belkin SoundForm Surround: Who It's For
The SoundForm Surround takes the opposite approach: it's a classic over-ear headphone designed to be worn for very long stretches. The ear cups are padded for all-day comfort and passive sound absorption, the headband adjusts to fit different head sizes, and the whole thing folds up for travel. It's built from plastic, fabric and foam in black, which keeps the weight reasonable for a full-size headphone without pretending to be a premium metal-and-leather piece.
The headline number here is battery: 60 hours of average life on a single charge. That's the kind of figure that means you can take a trip, work a full week of commutes, and not think about the charging cable. When you do need to top up, a 10-minute charge time is listed — handy before you walk out the door. The built-in microphone uses environmental noise cancellation for calls, so meetings from a noisy kitchen are at least workable.
Sound is handled by 40mm dynamic drivers with a 20Hz–20kHz frequency range, tuned for everyday listening — music, podcasts, video — rather than analytical detail. Connectivity runs on Bluetooth 5.4 with a 33-foot (10m) range and two-device multipoint, so hopping between a laptop and a phone is straightforward. The genuinely useful extra is the 3.5mm AUX cable in the box along with a USB-C charging and audio cable: if the battery dies mid-flight or you want a zero-latency wired session at a desk, you just plug in.
Buy it if you work from home or an office, take long flights, or want one headphone for the whole day with a wired fallback. Skip it if you need something that disappears into a pocket, you want an in-ear fit for running, or you care about advanced codecs and app-based EQ — those simply aren't part of this design.
• Best for battery life → Belkin SoundForm Surround. 60 hours versus 40 hours total on the EarFun (and only 23 hours with LDAC active).
• Best for portability → EarFun Air 2. Two 4.5g buds and a 50g case beat a foldable full-size headphone for pocket space.
• Best for Android hi-res streaming → EarFun Air 2. LDAC and Hi-Res Audio certification are the whole point here, and they're absent on the Belkin.
• Best for iPhone users → Belkin SoundForm Surround. LDAC doesn't work on iOS, so one of the EarFun's main selling points is off the table.
• Best for workouts and rain → EarFun Air 2. IPX7 sealing is designed for sweat and splashes; the Belkin is a home, office and commute headphone.
• Best for marathon wear sessions → Belkin SoundForm Surround. Over-ear cups with a padded, adjustable headband are made for hours at a desk or on a plane.
• Best for wired backup → Belkin SoundForm Surround. The included 3.5mm AUX cable means it never becomes a paperweight.
• Best for tuning your own sound → EarFun Air 2. The EarFun App's multi-EQ and remappable touch controls give you far more control than push buttons and a fixed tuning.
In my opinion, the right pick comes down to one question: do you want earbuds or headphones? If you're on Android, move around a lot, and want LDAC, app EQ and IPX7 protection in something pocket-sized, I'd buy the EarFun Air 2 — just accept that LDAC halves your battery and that iOS users should look elsewhere. If you'd rather have one comfortable over-ear pair with 60 hours of battery and a 3.5mm cable for the day the charge runs out, I'd buy the Belkin SoundForm Surround. For most people who wear headphones for hours at a desk or on flights, the Belkin is the safer long-term companion; for anyone who lives on their feet, the EarFun wins.
Before deciding, check the current price on Amazon for both — the value story changes a lot depending on what each is going for when you buy.
Yes, it pairs and plays over standard Bluetooth with iOS. What you won't get is LDAC, since that codec isn't compatible with iOS devices — you'd be listening over a standard Bluetooth codec. The Belkin SoundForm Surround has no such limitation and works the same way across platforms.
The Belkin, by a wide margin: 60 hours of average battery life on a single charge, versus 40 hours total for the EarFun including its charging case. With LDAC enabled, the EarFun drops to 23 hours total and 5.5 hours per charge, so heavy LDAC listeners will charge far more often.
Yes. It ships with a 3.5mm AUX audio cable plus a USB-C charging and audio cable, so you can listen wired. The EarFun Air 2 has no headphone jack — it's wireless only, charged via USB-C or a wireless charging pad.
Both use environmental noise cancellation with built-in microphones. The EarFun Air 2 uses four active mics to separate your voice from background noise, while the Belkin relies on its built-in mic with ENC. For calls on the move, the earbuds' mic array is the more purpose-built setup; for long desk meetings, the over-ear fit is more comfortable.
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