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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 7 min read · Independent comparison
• mojawa Aerra IP67 — biggest strength: an IP67 fully sealed body plus a touch-controlled, dual-device Bluetooth 5.2 setup that keeps calls and music flowing while your ears stay open to traffic and teammates.
• mojawa Aerra IP67 — biggest trade-off: IP67 means rain, sweat and splashes are fine, but it is not rated for swimming, and the long 8-hour charge time means you plan your charging rather than grab-and-go.
• Voistek Bone Conduction Headphones — biggest strength: IP68 protection rated for submersion up to 2 meters for up to 2 hours, combined with a 32GB built-in MP3 player that holds roughly 8,000 songs so you can swim or train without a phone.
• Voistek Bone Conduction Headphones — biggest trade-off: Bluetooth simply does not work underwater, so swimming forces you into MP3 mode, and the button-and-voice control scheme is more old-school than touch.
• Who each pick is for: pick mojawa Aerra IP67 if you want a lightweight all-day open-ear headphone for running, cycling and commuting; pick Voistek Bone Conduction Headphones if your workout happens in a pool and you want phone-free playback.
The Aerra is the more "everyday athlete" of the two. Its open-ear shape sits outside the ear canal, which means you keep ambient awareness while you run, ride or walk busy streets — and there is no pressure build-up from jammed-in tips during long sessions. The build uses silicone and thermoplastic elastomer, so it is soft against the head and light enough to forget about, and the black-and-orange finish is clearly aimed at sport rather than office wear.
What stands out to me in the specs is the waterproofing story. IP67 is a fully sealed, integrated body rating — the kind of thing that survives heavy sweat and an unexpected downpour without you babying it. That, plus the 8-hour music-and-calls figure, makes it a genuinely dependable training partner. The magnetic fast charging is a nice touch too: a 5-minute top-up is quoted as giving an extra 1.5 hours of playtime, which is exactly the kind of thing that saves you when you grab the headphones on the way out the door. Full charge takes 8 hours, so the fast-charge trick is the one you will actually use.
Audio-wise, mojawa leans into its own Audio-Haptics Integrated System, which is designed to make low-frequency rhythm feel more present — a real consideration with bone conduction, where bass is traditionally the weak point. There are three selectable modes (Equalizer, Bass Boost, Vocal Enhancement), Bluetooth 5.2 for stable pairing, dual-device connection so you can hop between a phone and a laptop, and dual silicone microphones with ENC noise cancellation for calls. Touch controls keep the surface clean. The warranty is two years.
Buy it if you want one open-ear headphone for running, cycling, gym work and calls, and you value fast top-ups and dual-device switching. Skip it if you swim — IP67 is water-resistant, not swim-rated, and there is no built-in music storage.
The Voistek is built around one idea that the Aerra does not have: music without a phone. There is 32GB of built-in storage, which the brand frames as room for roughly 8,000 songs, and you switch between Bluetooth and MP3 mode with a double-click of the multi-function button. That single feature changes who this product is for. If you swim, you already know the problem — Bluetooth does not transmit underwater, so the only way to listen in a pool is on-board storage. Voistek solves exactly that, and the IP68 rating supports it: submersible up to 2 meters for up to 2 hours, which covers pool training, snorkeling and rainy outdoor sessions.
The frame is the other headline. It is titanium, adjustable, and described as surviving 10,000 bends and roughly 200 lbs of force while snapping back into shape. In practice that means the headband adapts to different head sizes and does not feel fragile when you stuff it in a swim bag. Soft contact pads and sweat-proof silicone ear pads are there to reduce slipping during running, cycling and yoga. Enclosure materials are ABS, rubber and titanium, and the color is grey.
On the tech side you get Bluetooth 5.3 with a stated 15-meter range, button and voice control (including Google Assistant and Siri), and a built-in microphone that the brand says reduces wind noise. Battery life is 8 hours with a much quicker 1.5-hour charge time than the Aerra. The 16.3 mm bone conduction driver, 80-ohm impedance, 86 dB sensitivity and 20 Hz–20 kHz range are all listed. Charging is magnetic and self-aligning, which is a small but genuinely useful detail for a wet, sandy product. Two-year warranty as well.
Buy it if you swim, snorkel, or want to train without carrying a phone. Skip it if you mostly take calls and switch between two devices — that is the Aerra's territory, not this one.
• Best for swimming → Voistek Bone Conduction Headphones. IP68 with 2-meter/2-hour submersion is a swim rating; the Aerra's IP67 is not.
• Best for phone-free workouts → Voistek Bone Conduction Headphones. 32GB of on-board storage (around 8,000 songs) means no phone in the pool or on the gym floor.
• Best for calls and multitasking → mojawa Aerra IP67. Dual silicone microphones with ENC noise cancellation and dual-device Bluetooth pairing are aimed squarely at voice and switching between phone and laptop.
• Best for quick top-ups → mojawa Aerra IP67. A 5-minute charge is quoted at 1.5 extra hours, versus the Voistek's need for a 1.5-hour full charge.
• Best for sound tuning → mojawa Aerra IP67. Three selectable modes (Equalizer, Bass Boost, Vocal Enhancement) plus an audio-haptics system give you more ways to shape the low end.
• Best for durability against rough handling → Voistek Bone Conduction Headphones. The titanium frame's bend-and-snap-back design is the more forgiving choice for bags and pool decks.
• Best for control feel → mojawa Aerra IP67. Touch controls versus the Voistek's button-and-voice scheme — a matter of preference, but touch is the more modern approach.
• Best for wireless range → Voistek Bone Conduction Headphones. Bluetooth 5.3 with a 15-meter stated range edges the Aerra's 5.2.
If I had to pick one, I would buy the Voistek Bone Conduction Headphones — not because it is better at everything, but because it does something the Aerra cannot: it plays music with no phone and survives actual swimming. That combination is rare in this category, and it makes the Voistek the more versatile single purchase for a mixed routine of pool, gym and outdoor sessions. The only buyer I would steer away is someone whose priority is call quality and juggling two devices — and for that person, the mojawa Aerra IP67 is the smarter, more polished everyday choice.
FAQ
The Voistek. Its IP68 rating covers submersion up to 2 meters for up to 2 hours, and its built-in MP3 mode is what lets you hear anything underwater at all, since Bluetooth does not work there. The Aerra's IP67 handles sweat and rain but is not a swim rating.
Based on the specs, the mojawa Aerra IP67 is the more call-focused product: dual silicone microphones with ENC noise cancellation, dual-device pairing and touch controls. The Voistek has a built-in mic with wind-noise reduction and voice-assistant support, but its design centers on playback, not calls.
Both are listed at 8 hours of playback. The difference is charging: the Aerra quotes a 5-minute quick charge for 1.5 extra hours but takes 8 hours for a full charge, while the Voistek takes about 1.5 hours to fully charge. Check the current price on Amazon before deciding, since value will shift with whatever each one costs when you buy.
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