We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-20 · 8 min read · Independent comparison
If you want open-ear headphones that keep you aware of traffic, trail and gym surroundings while you train, choose Purity Air Open Ear; if you need kid-safe volume limits, an 85-hour battery and a headset built to survive being dropped in a backpack, choose Botesty Sound Kids.
These two are barely in the same category, and that's exactly why the choice is easier than it looks. One is an adult open-ear sports headset; the other is a volume-limited kids' over-ear. Pick by the person wearing it, not by the spec list.
• Purity Air Open Ear — biggest strength: open-ear air conduction design with 15mm dynamic drivers and an IPX5 sweat-resistant build, so your ears stay open to what's happening around you while you run or ride.
• Purity Air Open Ear — biggest trade-off: battery life is listed at around 6 hours, there's no active noise cancellation, and the neckband open-ear shape is a very specific fit that won't suit everyone.
• Botesty Sound Kids — biggest strength: an 85-hour battery rating (about 20 hours with the LEDs on), dual 85dB/94dB volume limits and a twist-resistant steel frame made for kids.
• Botesty Sound Kids — biggest trade-off: it's a children's product in pink with a cartoon theme, no noise cancelling, and the 250ms audio latency rating means it's a listening headset, not a gaming one.
• Who Purity Air Open Ear is for: adult runners, cyclists, gym-goers and commuters who want music plus situational awareness.
• Who Botesty Sound Kids is for: parents buying a first proper wireless headset for a toddler, kid or young teen.
The Purity Air Open Ear is built around one idea: sound that reaches your ear without plugging it up. The drivers sit outside the ear canal in an open-ear, neckband-style frame, and they're unusually large for this format at 15mm. In my opinion that's the most interesting number on the sheet, because bigger dynamic drivers in an open design usually mean you get more body and detail than the thin, tinny output people associate with cheap bone-conduction-style sets. The frequency range is a standard 20Hz to 20,000Hz and impedance is a low 18 ohm, which is the kind of load a phone drives comfortably over Bluetooth 5.3.
Now the honest part. Battery life is rated at about 6 hours. For a 5K, a gym session or a commute, fine. For a long ride or a full workday of listening, you'll be charging more often than you'd like, and the included cable is USB-A rather than USB-C. There's no noise cancelling at all — the spec sheet says "None" — so on a plane or a loud train this is the wrong tool, and the open design leaks sound both ways. It's also an adult product: no volume limiter, no kid-proofing, and the neckband shape is a fit you'll either love or find fiddly.
Botesty Sound Kids: Who It's For
The Botesty Sound Kids is a children's headphone designed by people who clearly thought about how kids actually treat things. The frame is a plastic-wrapped steel band that resists twisting and bending, the materials are BPA-free, and the ear cups rotate to fit different head sizes. That combination — flex where it needs to flex, steel where it would otherwise snap — is the single most important thing on this sheet for a parent, because the failure mode of cheap kids' headphones is always the same: the band cracks within a month.
The second thing that matters is the volume limiter. There are two settings, 85dBA and 94dBA, and you switch between them depending on the child and the environment. That's the feature I'd buy this for. Toddlers get the lower limit; an older kid on a noisy school bus can use the higher one. Sensitivity is listed at 85dB and the drivers are 40mm dynamic units with a 20Hz–20KHz range and 32 ohm impedance — a big-driver, easy-to-drive setup that suits tablets, school laptops and in-flight entertainment more than critical listening.
Battery is where this thing is genuinely absurd for the category: 85 hours with the LEDs off, roughly 20 hours with them on, and a USB-C fast-charge claim of 9.5 hours of playback from a 10-minute top-up. The 660mAh cell takes about 2.5 hours to fill. If you've ever handed a child a dead headphone at an airport gate, you understand why that fast-charge line is the real headline here. There's also a 3.5mm jack and an included AUX cable, so on a plane or in a car with no Bluetooth you can just plug in and keep going — no battery anxiety at all.
Side-by-Side: Which Should You Choose?
• Best for running, cycling and outdoor training → Purity Air Open Ear. IPX5 sweat resistance plus open-ear awareness is the whole reason it exists.
• Best for situational awareness → Purity Air Open Ear. You hear traffic and other people while you listen; sealed headphones can't do that.
• Best for battery life → Botesty Sound Kids. 85 hours with lights off versus roughly 6 hours on the Purity, and that's not close.
• Best for hearing safety with kids → Botesty Sound Kids. The switchable 85dB/94dB limiter is a feature the Purity simply doesn't have.
• Best for calls in a noisy place → Purity Air Open Ear. Dual mics with environmental noise cancellation are aimed squarely at voice clarity.
• Best for durability around children → Botesty Sound Kids. BPA-free build and a plastic-wrapped steel frame that resists twisting and bending.
• Best for long flights and travel with a child → Botesty Sound Kids. 3.5mm AUX for unlimited wired use when the battery is empty.
• Best for sound detail in an open design → Purity Air Open Ear. Two 15mm dynamic drivers in an open-ear format deliver more music detail than you'd expect from the category.
If I were buying for myself, I'd take the Purity Air Open Ear. I run and ride outdoors, and the combination of open-ear awareness, IPX5 sweat resistance and proper 15mm drivers is exactly what I want in a training headphone — I can live with a 6-hour battery for sessions and commutes, and I'd accept that it's useless on a plane. If I were buying for a child, I wouldn't hesitate on the Botesty Sound Kids. The volume limiter, the steel-cored frame and that 85-hour battery are the three things that actually matter when a kid owns a headphone, and the wired fallback means it never becomes a dead weight in a bag. Different buyers, different answers — but if you're the one wearing them on a run, my pick is the Purity.
Yes, that's its clear purpose. IPX5 water resistance handles sweat and light rain, the open-ear design keeps you aware of traffic, and the neckband frame stays put. Just plan on charging after roughly 6 hours of use.
The design points that way. You can switch the volume limit between 85dBA and 94dBA, and the BPA-free build with a steel-cored, twist-resistant band is aimed at exactly this age group. Use the lower limit for younger children.
The Botesty Sound Kids, by a wide margin. It's rated at 85 hours with the LED lights off and about 20 hours with them on, plus a fast charge that gives around 9.5 hours from a 10-minute top-up. The Purity Air Open Ear is rated at about 6 hours.
Yes. It has a 3.5mm jack and ships with an AUX cable, so you can run it wired with no battery at all. That's a real advantage for long travel days with kids.
Both are affordable in their categories, but I can't quote numbers here — check the current price on Amazon using the button on this page, since pricing moves around and the two products sit in very different segments anyway.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.