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Monster

Monster Open Ear AC210 Headphones, Bluetooth 5.4 Earphones Stereo Sound, Wireless Headphones 30 Hours Playback, Type-C Charging, HD Clear Calls, Touch Control, IPX5 Waterproof Open Ear Earbuds,Black

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$19.98 Why this price?
Save $17.01 was $36.99

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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Jul 29
Order within 20 hours and 3 minutes
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Features

  • True Open Ear Headphones The Monster AC210 features a completely open-back design for ultimate comfort, allowing sound to embrace the ears.
  • 360 Excellent Sound Quality The Monster AC210 Bluetooth headset uses dual powerful 12mm dynamic driver units and modified PI composite beryllium diaphragms, as well as the 30mW thrust of the DAC sound card to make the sound more three-dimensional and concrete.
  • Resists Hearing LossThis open-back earplug avoids the most common health concerns of traditional earplugs because it never actually enters the ear. No pinching of the auricle, no pain, and no damage to hearing.
  • Extra long battery lifeUp to 6 hours of listening time (up to 30 hours when combined with the charging case)
  • These headphones also make a great Christmas or birthday gift, or a perfect gift for adults to exchange. If you have any questions, please feel free to contact us; our professional team will be happy to assist you.

Brand: Monster


Color: E29BK


Noise Control: None


Headphones Jack: No Jack


Wireless Communication Technology: Bluetooth


Brand Name: Monster


Model Number: E29BK


Age Range Description: Adult


Manufacturer: Monster


Headphone Jack: No Jack


Wireless Technology: Bluetooth


Bluetooth Version: 5.4


Control Method: Touch


Battery Charge Time: 6 Hours


Battery Average Life: 6 Hours


Noise Control: None


Audio Driver Type: Dynamic Driver


Enclosure Material: Plastic, Silicone, Fabric


Specific Uses For Product: Fitness


Compatible Devices: Smartphones, Laptops, Desktops, Tablets, Televisions, Smart Speakers


Water Resistance Level: Waterproof


Additional Features: Open Ear Design, Water Resistance


Earpiece Shape: open-ear


Color: E29BK


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • A great buy!! First-time open ear experience! A great buy!! First-time open ear experience!
Review Image by Alaina J.
Review Image by Alaina J.
These are incredibly comfortable. As someone with piercings and notorious issues with headphones I wanted to give open ear a try and I’m so happy I did. Great sound quality as well. As a woman it’s important I can still hear my surroundings while wearing headphones and this gives me that :) battery life is great too and the case is a charger too! ... show more
Reviewed in the United States on January 6, 2026 Reviewed in the United States on January 6, 2026 by Alaina J.
    • Open ear head phones
Sound quality is awesome fits perfectly in your ears Battery life last great quality for your money
Reviewed in the United States on April 1, 2026 by Rachel
    • Comfortable Fit with Excellent Audio—Limited Features
The audio quality is great—clear, balanced sound with a secure fit that stays in place. They’re also very comfortable to wear for extended periods. I specifically needed earbuds that don’t go deep into the ear canal, and these check that box perfectly. The only downside is the lack of controls. There’s no option to adjust volume or pause playback directly from the earbuds, which can be inconvenient. Overall, if comfort and sound are your priority, these are a solid choice—just be aware of the limited functionality ... show more
Reviewed in the United States on May 26, 2026 by Royce
    • Monsterous
Work great sound great great price Lets see how long they last! Well its been several weeks, still sound great but battery only lasts about 3 hours at 25% volume! At least they sound good.
Reviewed in the United States on January 14, 2026 by Bam
    • Wish I could return these
The battery life is super short, like 4 hours. There's no way to tell how much charge the charging case has. And the difference between the lowest and next to lowest volume setting is too big. The lowest setting is too low and the next to lowest setting is too loud. Not pleased with these.
Reviewed in the United States on January 17, 2026 by Megan G
    • Pretty but that's all
They are pretty, but that's it. The over the ear piece feels flimsy. Difficulty putting it behind my ear. Once I get it into place the bulbous tip is easily dislodged. They needed charging every 2 hours. Not work the effort required to use them.
Reviewed in the United States on February 2, 2026 by Cynthia
    • Extremely comfortable
These are the most comfortable earbuds I have ever worn. They fit over the ears and set on top of the opening of the ears so they don't actually go into the ears which can cause discomfort and itching. I highly recommend these earbuds.
Reviewed in the United States on May 6, 2026 by A. B. Grace
    • Stellar sound quality for open ear headphones
Great sound quality, great comfort, and pretty good battery life. In order to get the volume low enough to something I could listen to in bed/fall asleep to, needed to download an EQ app
Reviewed in the United States on January 13, 2026 by ThatPaulguy

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