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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-28 · 7 min read · Independent comparison
• Amazon Renewed Beats Solo 4 — biggest strength: Custom acoustic architecture with updated drivers, up to 50 hours of wireless playback, and Bluetooth 5.3 with a stated range up to 100 meters.
• Amazon Renewed Beats Solo 4 — biggest trade-off: It's an on-ear, sealed design in a single Cloud Pink finish, so it blocks outside sound and doesn't come with a charging case.
• Aurotlu Open Ear — biggest strength: Open-ear hook design that leaves your ear canal clear, IPX7 sweat/water resistance, and a charging case that extends total playtime to roughly 60 hours.
• Aurotlu Open Ear — biggest trade-off: Open-ear buds naturally leak in ambient noise, and the 12-hour single-charge figure is far below the Beats Solo 4's 50 hours.
• Pick Amazon Renewed Beats Solo 4 if you want immersive on-ear listening at home, on a commute or at a desk, across Apple and Android devices.
• Pick Aurotlu Open Ear if you want to stay aware of traffic and surroundings while running, walking or training, and you value a compact case over isolation.
The Amazon Renewed Beats Solo 4 is an on-ear wireless Bluetooth headphone built around a custom acoustic architecture and updated drivers, with a 32-ohm impedance and a plastic enclosure finished in Cloud Pink. In plain terms, this is the pick for someone who wants the fuller, more enclosed feel of a traditional headphone — the kind of sound that fills your ears rather than sitting beside them. The ear cups rest on your ears rather than inside them, and the design is intentionally minimalist.
Battery life is the headline. Beats lists up to 50 hours of continuous wireless playback on a single charge, which is the kind of figure that means you can go days of normal listening between charges. Connectivity is Bluetooth 5.3 with a stated range of up to 100 meters, and it works with both Apple and Android devices, so you're not locked into one ecosystem. The controls cover media playback and can be handled by push button, touch or voice, and the headphone supports Active Noise Cancellation — useful if you want to mute a noisy room rather than stay aware of it.
Who should buy it: anyone who mostly listens at a desk, on a plane, on a train or around the house and wants an enclosed, noise-cancelling on-ear experience with a long charge cycle. It's also a good fit if you switch between an iPhone and an Android phone, because the platform compatibility is genuinely broad. The "Renewed" status means the unit is professionally inspected and tested to work and look like new, and it carries a 90-day limited warranty — worth knowing if the idea of a refurbished product gives you pause.
Who should skip it: if your priority is hearing traffic, a running partner or your surroundings while you exercise, this is the wrong tool. The on-ear, sealed design is built to keep sound in and noise out. It's also not the pick if you want a pocketable charging case or an IPX7 water-resistance rating — neither is listed here. And if you specifically want a color other than Cloud Pink, this listing won't help you.
The Aurotlu Open Ear is a very different animal. These are open-ear wireless earbuds that hook over your ear rather than sealing into the canal, with 16.3mm dynamic drivers and a built-in mic. The whole point of the design is awareness: because nothing plugs your ear canal, external sound reaches you while your music plays. If you've ever wanted to run along a road, bike a path or lift weights while still hearing what's going on around you, that's exactly the scenario this shape is engineered for.
The spec sheet leans hard into sport. It's IPX7 sweat- and water-resistant, so rain and heavy perspiration aren't a concern. Playtime is listed at 12 hours of continuous playback on a single charge, with up to 80 hours of standby, and the included magnetic charging case adds roughly 48 more hours — bringing the total to about 60 hours. The case recharges fully in about an hour over the included Type-C cable and has an LED digital display so you can see the remaining power at a glance. Connectivity is Bluetooth 5.4, which the brand highlights for faster, more stable transmission and low latency, and there's flexible touch control for tapping through functions. The package includes the headphones, a box, a cable, a user manual and the wireless charging case, and the warranty runs three months.
Who should buy it: walkers, runners, cyclists, gym-goers and anyone who works out or moves through the world and refuses to be deaf to it. The hook-over fit and the no-canal-pressure design also suit people who find traditional in-ear buds uncomfortable after an hour or two. The built-in mic and the 16.3mm drivers make it a reasonable pick for calls and casual listening on the move, too.
Who should skip it: if you want deep isolation and noise cancellation for a flight or a loud office, open-ear is the opposite of what you want — you'll hear everything. If you want the longest possible single-charge runtime, the Beats Solo 4's 50 hours beats Aurotlu's 12. And if you prefer a conventional headphone form factor over ear hooks, this isn't it.
• Best for battery life → Amazon Renewed Beats Solo 4. Up to 50 hours of continuous playback on one charge versus 12 hours per charge for the Aurotlu (about 60 hours total with the case).
• Best for staying aware of your surroundings → Aurotlu Open Ear. The open-ear design deliberately lets outside sound in, which is the whole reason it exists.
• Best for workouts and sweat → Aurotlu Open Ear. IPX7 water and sweat resistance plus a secure ear-hook fit is built for movement; the Beats Solo 4 lists no IP rating.
• Best for noise cancellation and immersion → Amazon Renewed Beats Solo 4. Active Noise Cancellation and a sealed on-ear fit are designed to shut the world out.
• Best for wired-free range flexibility → Amazon Renewed Beats Solo 4. Bluetooth 5.3 with a stated range up to 100 meters.
• Best for portability → Aurotlu Open Ear. A compact magnetic charging case with an LED display is far easier to pocket than full-size on-ear headphones.
• Best for Apple and Android switching → Amazon Renewed Beats Solo 4. Universal compatibility across both platforms is called out directly.
• Best for long, comfortable listening sessions without ear-canal pressure → Aurotlu Open Ear. Nothing enters the canal, so there's no plugging sensation over time.
If I had to pick one, I'd take the Amazon Renewed Beats Solo 4 — but only if my listening happens at a desk, on a commute or at home rather than mid-run. In my opinion, the combination of a custom acoustic architecture, Active Noise Cancellation and up to 50 hours per charge is simply the more capable package for everyday music and calls, and the Apple/Android compatibility means it follows me across devices. If your life is more treadmill than armchair, though, I'd flip to the Aurotlu Open Ear without hesitation — IPX7, a charging case and open-ear awareness are exactly what sport demands. Buy the Beats for immersion; buy the Aurotlu for awareness.
They receive audio from your phone or computer over a Bluetooth radio link instead of a cable. The Beats Solo 4 uses Bluetooth 5.3 with a stated range up to 100 meters; the Aurotlu uses Bluetooth 5.4, which the brand highlights for more stable transmission and low latency.
Generally you power the headphones on and hold or press the pairing control until the indicator starts flashing, then select the device in your phone's Bluetooth menu. The Beats Solo 4 supports push-button, touch and voice control, while the Aurotlu uses flexible touch control for its functions.
Turn the headphones on and put them in pairing mode, open your phone's Bluetooth settings, and tap the headphone name when it appears. Both the Beats Solo 4 and the Aurotlu Open Ear connect wirelessly over Bluetooth, and the Beats works with both Apple and Android devices.
How to connect sony wh ch520 on ear wireless bluetooth headphones
You'd pair them the same way as any Bluetooth headphone: power on, enter pairing mode, then select them in your phone's Bluetooth list. If you're comparing, note the Sony model isn't part of this comparison — the two options covered here are the Amazon Renewed Beats Solo 4 and the Aurotlu Open Ear, and you can check the current price on Amazon before deciding.
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