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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want an open-ear sports headphone that stays put and survives sweat and rain, choose mojawa Aerra IP67; if you need active noise cancelling for commuting, travel or long work sessions, choose Sony WH-CH720N. These two look like they compete on a shelf, but they're built for opposite lives. One clips around your ears and lets the world in on purpose. The other seals you off from the world on purpose.
• mojawa Aerra IP67 — biggest strength: IP67 sealed waterproofing and an open-ear bone conduction design, so sweat, rain and traffic awareness aren't problems you have to manage.
• mojawa Aerra IP67 — biggest trade-off: 8 hours of playtime, no active noise cancelling, and an open design that by nature lets outside sound in.
• Sony WH-CH720N — biggest strength: Active noise cancelling with Dual Noise Sensor tech and up to 35 hours of battery in a 192g over-ear body.
• Sony WH-CH720N — biggest trade-off: No water or sweat resistance rating, an over-ear fit that traps heat, and a design that isn't meant for hard training.
• Pick mojawa Aerra IP67 if you run, ride, lift or train outdoors and want your ears open to the world.
• Pick Sony WH-CH720N if you want quiet — on a plane, in a busy office, or on a long day of focused listening.
This is a bone conduction sport headphone, and everything about it points at movement. The driver sits against your cheekbone rather than inside your ear canal, so nothing is jammed in your ear and nothing blocks the sounds around you. For runners, cyclists and anyone training near traffic, that's the whole point: you hear a car, a shout, a bike bell, while the music plays. The IP67 rating means the body is sealed against sweat and rain, which is the failure mode that kills ordinary earbuds during a heavy session.
Battery is rated at 8 hours of music and calls, with magnetic fast charging — a 5-minute top-up gives you about 1.5 hours of playback. That's a practical pairing: short charge before a run, full charge for a long week of workouts. Bluetooth 5.2 keeps pairing stable and latency low, and dual-device connection lets you stay linked to a phone and a laptop at once, switching as needed. Calls run through dual silicone microphones with ENC noise cancellation, and the audio side uses the Mojawa Audio-Haptics Integrated System with three selectable modes — Equalizer, Bass Boost and Vocal Enhancement — calibrated with input from Grammy-winning producers, according to the manufacturer.
Sony WH-CH720N: Who It's For
The WH-CH720N is a different animal entirely. Sony calls it its lightest wireless noise-cancelling headband model at 192g, and that lightness matters because over-ear headphones live or die on whether you can wear them for hours. The headband was restructured to give the ears more room, and with the metal and recycled plastic build, it's aimed at desk work, movies and long listening sessions rather than sprints.
The headline feature is active noise cancelling driven by Dual Noise Sensor technology and Sony's Integrated Processor V1. Around that sits an adjustable Ambient Sound mode with 20 levels, plus Adaptive Sound Control that tailors the mix to your environment and learns places you visit often. There's a "Focus on Voice" chat mode so you can talk without pulling the headphones off, and voice pickup for calls uses beamforming microphones. The audio side relies on the same Integrated Processor V1 and DSEE, which upsamples compressed streaming files — with a 20Hz–20kHz frequency range, 325 ohm impedance and 108 dB sensitivity.
Battery is the other big number: up to 35 hours, with a 3-minute charge giving roughly an hour of playback over USB-C. Multipoint pairing connects two Bluetooth devices at once with quick switching. You also get push-button controls, Google Assistant and Alexa support, and a 10-metre Bluetooth range.
Who should buy it: commuters, remote workers, students, frequent flyers and anyone who wants to disappear into their music or a meeting. The quiet is the product. Who should skip it: if you train hard and sweat heavily, there's no water or sweat rating here — over-ear headphones and soaked hair are a bad combination. And if you need to hear traffic while running, this design works against you. The warranty is one year versus mojawa's two.
• Best for running and cycling → mojawa Aerra IP67. Open-ear awareness plus IP67 sealing is built for exactly this.
• Best for noise cancelling → Sony WH-CH720N. Active noise cancelling with Dual Noise Sensor tech and a 20-level ambient mode.
• Best battery life → Sony WH-CH720N. Up to 35 hours versus 8 hours on the mojawa.
• Best for sweat and rain → mojawa Aerra IP67. IP67 versus no water-resistance rating on the Sony.
• Best for long work or study sessions → Sony WH-CH720N. 192g, over-ear comfort, multipoint and adaptive sound.
• Best for hearing your surroundings → mojawa Aerra IP67. Bone conduction keeps your ears fully open.
• Best for calls in noisy places → Sony WH-CH720N. Beamforming mics and voice pickup tech target this use case.
• Best for quick top-ups → both. Mojawa gives 1.5 hours from a 5-minute charge; Sony gives an hour from 3 minutes.
If I had to pick one, I'd pick based on where you'll actually wear it. For anything that involves moving outdoors — running, cycling, gym work, sweating in the sun — I'd buy the mojawa Aerra IP67, because the IP67 body, open-ear safety and dual-device pairing make it genuinely fit for that job, and nothing on the Sony side is designed for it. For commuting, flights, office noise and marathon listening sessions, I'd buy the Sony WH-CH720N instead: the noise cancelling and 35-hour battery are the reasons it exists. In my opinion these aren't rivals so much as two tools for two different problems. Decide which problem is yours first.
FAQ
They're different by design. The Sony uses a dynamic driver with active noise cancelling and DSEE processing for a balanced, immersive sound. The mojawa uses a bone conduction driver with three audio modes. Which sounds "better" depends on whether you want isolation or awareness — and you should check the current price on Amazon before deciding.
The Sony, clearly. It's rated up to 35 hours with a 3-minute quick charge giving about an hour. The mojawa is rated 8 hours, with a 5-minute charge adding roughly 1.5 hours.
The Sony WH-CH720N. Active noise cancelling, a 20-level ambient sound mode and adaptive sound control are all built for exactly that. The mojawa deliberately lets outside sound in, which is the opposite of what you want in a noisy office.
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