We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-03 · 6 min read · Independent comparison
If you want maximum call clarity with four ENC microphones and a higher waterproof rating, choose Aoslen Earbuds; if you need longer battery life in a lighter, more pocketable bud, choose Csasan Earbuds.
• Aoslen Earbuds — biggest strength: Four ENC microphones and a claimed 75% vocal improvement, plus IP7 waterproofing and a 13mm driver for HiFi stereo sound.
• Aoslen Earbuds — biggest trade-off: Playback tops out at 6–7 hours per charge, so heavy all-day listeners will reach for the case sooner.
• Csasan Earbuds — biggest strength: Up to 8 hours on a single charge and a total 40 hours with the case, in a bud that weighs just 4g per side.
• Csasan Earbuds — biggest trade-off: Two mics per bud instead of four, so the call-noise story is less aggressive on paper.
• Pick Aoslen Earbuds if: You take a lot of calls in noisy places and want the stronger mic array and IP7 rating.
• Pick Csasan Earbuds if: You want the longest listening time and the lightest fit for commuting, travel or long workdays.
Aoslen built this pair around calls and clarity. The headline spec is the mic setup: four high-definition microphones with Environmental Noise Cancellation, which the brand says improves vocals by 75% while adding 50% more bass. If you spend your day on voice calls, video meetings or voice notes, that array is the reason to look here. The 13mm dynamic driver covers a 20Hz–20,000Hz range, so music gets a full, warm presentation rather than a thin one.
The rest of the package is built for movement. Bluetooth 5.3 keeps the connection stable with lower latency and lower power draw, and the rated range stretches to 15 meters — enough to leave your phone on a desk and walk to the kitchen. IP7 waterproofing means splashes, sweat and rain are not a problem, which makes these a sensible pick for running, training or outdoor work. You get three ear-tip sizes (S/M/L), touch controls for play, calls, volume and voice assistant, and a separate LED display on the case so you can see the charge level of each bud.
Csasan Earbuds: Who It's For
Csasan takes the opposite approach: stretch the runtime and shrink the weight. The J90 Pro rates up to 8 hours of listening on a single charge, and the case adds roughly four to five full recharges for a total of about 40 hours. The case shows remaining power as numbers on a screen, with an LED bar for each bud's charging status, so you always know where you stand. If you hate the mid-afternoon "low battery" chime, this is the design that addresses it.
Weight is the other story. Each bud comes in at just 4g, and the in-ear surface has been repeatedly polished to balance looks and comfort. That matters on long calls, long flights and long shifts — lighter buds simply disappear in your ears. You still get a 13mm dynamic driver for deep bass and stereo sound, Bluetooth 5.3 with dual-channel transmission for fast one-step pairing, and a hall switch that reconnects automatically the moment you open the case. IPX7 waterproofing covers sweat, rain and splashes, and the touch control handles calls, music, volume and voice assistant.
Where Csasan gives ground is the microphone hardware. It uses two mics per bud with call noise cancellation — effective for everyday calls, but not the four-mic ENC array Aoslen advertises. If you regularly take calls from loud streets, busy offices or windy outdoor spots, that difference is worth weighing. Csasan also backs the pair with a 24-month repairment warranty, which is a real plus for anyone who wants long-term peace of mind. I recommend these for commuters, travelers and marathon listeners who want light buds and the longest possible playtime.
Side-by-Side: Which Should You Choose?
• Best for call clarity → Aoslen Earbuds. Four ENC mics versus two, with a stated 75% vocal improvement.
• Best for battery life → Csasan Earbuds. Up to 8 hours per charge and about 40 hours total, versus 6–7 hours and 42 hours total.
• Best for waterproofing → Aoslen Earbuds. IP7 is the higher rating of the two; Csasan is IPX7.
• Best for quick reconnects → Csasan Earbuds. The hall switch pairs and reconnects as soon as you open the case.
• Best for seeing exact charge levels → Aoslen Earbuds. Separate LED readouts for each bud and the case.
• Best for long-term coverage → Csasan Earbuds. A 24-month repairment warranty is included.
• Best for sports and sweaty workouts → Aoslen Earbuds. IP7 plus a sport-oriented fit with three tip sizes.
I would buy the Aoslen Earbuds. The four-mic ENC array, the 75% vocal claim and the IP7 rating line up with what most people actually use wireless earbuds for — calls, meetings and movement — and the 6–7 hour runtime is enough for a normal day. The Csasan pair wins on stamina, weight and warranty, and if you listen for eight hours straight or want the lightest bud possible, it is the smarter pick. For me, the microphone advantage decides it.
Pair the earbuds over Bluetooth, then open your computer's sound settings and select the earbuds as both the output and the input device. On most systems you may see two entries — a stereo playback profile and a hands-free profile — and the hands-free one is the one that carries your voice. Keep the buds within the Bluetooth range noted for your model, which is up to 15 meters for both the Aoslen and Csasan pairs.
How to use mic on wireless headphones
Put the buds in, connect them to your phone or laptop, and start a call or recording app. The microphones are built into the earbuds, so nothing else needs to be plugged in — you just talk normally. Both of these models use touch controls, so you answer and end calls by tapping the bud rather than reaching for your phone.
Yes. Any Bluetooth headset with a built-in microphone can act as a microphone for calls, voice chat and recording, as long as your device selects it as the input. The Aoslen pair has four ENC microphones and the Csasan pair has two per bud, so both are designed for two-way voice use, not just listening.
No. Plenty of Bluetooth headphones are listening-only and have no mic at all. Both earbuds here do include microphones — Aoslen with four ENC mics and Csasan with two per bud — so either will handle calls, but if voice quality in noisy places matters most, the larger mic array is the one I would lean toward.
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