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Smart AI ENC mic removes 99.999% of background noise for ultra-clear voice calls
Up to 100 dB noise suppression keeps your voice crystal clear anywhere
Privacy-focused mic isolates your voice, so callers hear only you
Detachable magnetic boom mic adjusts for perfect voice capture
Open-ear design offers secure, all-day comfort with situational awareness
Bluetooth 5.4, IPX4 waterproof, 7-hr playback per charge & high-quality stereo sound
Total Privacy for Every Call
Stay heard with unmatched clarity using the Emerson NoiseZero Earphones ES204, designed for work, travel, and everyday communication. These open-ear earbuds feature an advanced AI-powered ENC microphone that eliminates up to 99.999% of background noise—providing up to 100 dB of suppression so your voice stays front and center. Wind, chatter, engines, and gym noise disappear, giving callers a clean, professional sound no matter where you are.
The flexible, detachable boom mic adjusts to your ideal angle for meetings, gaming, or on-the-go calls, and can be removed when you just want a lightweight wireless listening experience. The open-ear design ensures secure comfort while keeping you aware of your surroundings—perfect for commuting, working out, or office use.
With Bluetooth 5.4 reliability, IPX4 water resistance, and a compact charging case, the Emerson NoiseZero Earphones ES204 deliver powerful noise elimination, total voice privacy, and all-day comfort.
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Smart AI Noise Cancellation
Experience next-level call clarity with advanced AI-powered noise-cancelling technology. This technology is built into the microphone to filter out up to 99.999% of unwanted sound, ensuring your voice comes through crisp, clean, and professional.
Powerful 100 dB Noise Suppression
Whether you're in a crowded gym, busy office, or noisy street, these earphones maintain exceptional voice clarity. With up to 100 dB of noise reduction, your voice stays sharp and consistent—even in the loudest environments.
Privacy-Focused Design
During calls, the mic captures your voice and blocks everything else, guaranteeing callers hear only you. Take important calls on a train, at a bar, at a convention, or even outside, and callers will still think you are in a quiet room alone. Distractions aren’t picked up to ensure maximum privacy and discretion.
Detachable Magnetic Boom Mic
The flexible boom mic snaps on magnetically to either earbud and adjusts to the perfect angle for optimal clarity. Remove it when you're off the clock, or use it during calls and gaming sessions for premium, studio-grade voice pickup.
Bluetooth version: 5.4
Voltage: 3.7 V
Charge input: DC 5 V - 1 A
Frequency: 20 Hz - 20 KHz
Earphone battery: 60 mAh*2
Charging case battery: 600 mAh
Battery type: Rechargeable polymer lithium battery
Earphone playback time per charge: 6 - 8 hours
Carrying case battery charging time: 25 hours
Carrying case battery life: 24 hours
Water resistance level: IPX4 waterproof
Package Contents: Wireless earbuds, Charging case, Detachable microphone, USB-C charging cable, User manual
Q: How do I pair the NoiseZero Earphones with my device?
A: Turn on Bluetooth on your device. Open the charging case and take out the earbuds. Look for “Emerson NoiseZero ES204” in your Bluetooth list and tap to connect.
Q: What are open-ear earphones?
A: Open-ear earphones rest outside your ear canal, allowing you to hear your surroundings while listening to audio.
Q: What is Environmental Noise Cancellation (ENC)?
A: ENC filters out background noise, making sure your voice sounds clear to whoever is on the other end of your call. This is different from active noise cancellation (ANC), which blocks out noises so the person wearing the earphones can’t hear them.
Q: Do the NoiseZero Earphones support Active Noise Cancellation (ANC)?
A: No, the detachable microphone of the NoiseZero Earphones supports Environmental Noise Cancellation (ENC), but the earphones do not support Active Noise Cancellation (ANC).
Q: Can I use the NoiseZero Earphones without attaching the microphone?
A: Yes, the earphones are still usable with or without the microphone attached.
Q: Are the NoiseZero Earphones suitable for outdoor use or workout sessions?
A: Yes, the open-ear design is great for running, cycling, or gym sessions, allowing you to stay aware of your surroundings. The IPX4 waterproof feature is also great for water/sweat resistance.
Q: How do I charge the NoiseZero Earphones and the charging case?
A: Place the earphones in the charging case to charge them. Use the included USB-C charging cable to charge the case.
Q: Do the NoiseZero Earphones support voice assistants like Siri or Google Assistant?
A: No, the NoiseZero Earphones do not support voice assistants.
Q: How long is the battery life with and without the microphone?
A: The battery life can vary. The earphones deliver 8 hours of continuous playback, or 6 hours when you attach the microphone.
Q: Are the NoiseZero Earphones compatible with PCs, smartphones, and tablets?
A: Yes, the NoiseZero Earphones use Bluetooth, making them compatible with:
Q: Can I use just one earbud at a time?
A: Yes, the NoiseZero Earphones support mono mode, allowing you to use either the left or right earbud separately.
I work from home and have meetings pretty much every day, so this lightweight, breathable earphone is really handy. The sound is clear, and the privacy mic makes other teammates only hear me, even if there is noise around the house. I also really like the mic snaps on magnetically. I can pop it on when I need it and take it off when I don't.
I work from home and have meetings pretty much every day, so this lightweight, breathable earphone is really handy. The sound is clear, and the privacy mic makes other teammates only hear me, even if there is noise around the house. I also really like the mic snaps on magnetically. I can pop it on when I need it and take it off when I don't.
I am pleased with the design, quality, comfort, and performance of these earphones. They are convenient to slip on and off and are comfortable to wear, even with prescription eyeglasses. I use them for voice-to-text communication (with xAI Grok) and they perform well when speaking at a normal conversational volume. The boom mike improves their ability to pick up voice when speaking at a slightly lower volume. Voices sound good and the battery lasts reasonably long. It would be nice to be able to see a battery level percentage but I am overall pleased with the product.
I got these to for work meetings, but people are reporting I sound muffled. I have gone through multiple device settings on the Windows PC but have had no luck in clearing up the muffled sound quality. In addition, the battery seems to be problematic. I have it on the charger constantly and can use them for roughly 15 minutes before it starts audibly notifying me "Battery Low". Checking windows bluetooth, the battery states 10%. Which doesnt make sense given they have spent more time on the charger than actually being used.
We're sorry to hear the NoiseZero Earphones aren't working for you the way they should. Judging by the description of your issue, it sounds as though you are experiencing a hardware issue of some kind. If you'd like, you can contact our customer service via email, where we can take the next steps of resolving your issue. Just contact us at support@emersonsmart.com.
I absolutely love these headphones! They're so lightweight and convenient!
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