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Item #:
236970275
Monster Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Headphones, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H
Item #:
236970275
TTD 189
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
8%
In stock
Imported from USA store
QTY:
Order now and get it around Thursday, August 13
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Experience pure and high-quality sound with the Open Free AC100 Headphones, designed for maximum comfort and seamless communication.
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What Stands Out
Immersive Sound
Experience rich, immersive audio with dual large drivers providing exceptional stereo clarity, perfect for music lovers seeking a premium listening experience.
Extended Playtime
Enjoy up to 30 hours of playtime on a single charge, making these headphones ideal for long runs or extended listening sessions without interruption.
Waterproof Design
Specifically designed for active users, these earbuds are waterproof, ensuring durability and performance even during intense workouts or in wet conditions.
Product Details
- 【Comfort Open-Ear】The Open-ear design of Air conduction earphones helps to achieve true painlessly and harmlessly. There is no need to put the earbuds in the ear canal, so ears will not feel sore and painful even when listening to music for the whole day.
- 【Immersive Stereo Sound Effects】Monster Open Free AC100 Open Ear headphones dive into a world of sonic richness with the expansive soundstage delivered by 16mm large drivers. From deep bass to crisp highs, every nuance of music is brought to life with breathtaking clarity.
- 【 AI Noise-canceling】Monster Open Free AC100 Open Ear headphones have built-in AI noise-canceling technology and dual microphones, which adopt environmental noise reduction technology to monitor the sounds around you and instantly produce an opposite signal to reduce background noise. Whether you're in a bustling café or a busy office, background noise fades away, leaving only crystal-clear conversations.
- 【Ultra Long Playtime】 These air-conduction headphones boast an impressive total battery life of 30 hours (at 50% volume) when combined with the charging case, allowing for uninterrupted listening sessions throughout the day. With each use lasting up to 6 hours, these headphones provide the perfect blend of longevity and reliability—no more battery anxiety.
- 【Advanced Bluetooth 5.3】With advanced Bluetooth headphones 5.3 technology, you can get 2X fast transfer speed (75% higher than the previous generation) and a more stable connection. Wireless headphones will be paired with each other automatically, and just hit on Bluetooth list "Monster Open Free AC100" on your device to connect, avoiding complex operations and saving waiting time. Whether you're pairing with your smartphone, tablet, or laptop, enjoy stable and efficient wireless connections for uninterrupted music enjoyment.
- 【Enhanced Awareness】Seamlessly transition between different environments with Monster Open Free AC100 Open-Ear design. Stay connected to your surroundings while enjoying your favorite tunes with these open-ear headphones. Whether commuting through busy streets or taking a stroll in the park, ambient sounds blend seamlessly with your music for an immersive listening experience.
- 【Dedicated After-Sales Support】At Monster, we prioritize your satisfaction. Our professional customer service team stands ready to assist with any inquiries or feedback you may have about our products. Don't hesitate to reach out–we're committed to ensuring a seamless shopping experience and finding solutions that meet your needs.
| Brand Name | Monster |
| Model Number | E18 |
| Model Name | ac100 |
| Built-In Media | User Manual |
| Age Range Description | Adult |
| Number of Items | 1 |
| Manufacturer | Monster |
| External Testing Certification | / |
| Headphones Ear Placement | Open Ear |
| Headphone Folding Features | Open ear |
| Earpiece Shape | Open-ear |
| Control Method | Touch |
| Battery Average Life | 30 hours |
| Noise Control | None |
| Audio Driver Type | Dynamic Driver |
| Frequency Range | [20 Hz - 20,000 Hz] |
| Enclosure Material | Plastic, Silicone |
| Specific Uses For Product | Sport |
| Compatible Devices | Smartphones, Tablets, Laptops, Gaming Consoles, Smart Speakers |
| Water Resistance Level | Waterproof |
| Additional Features | AI Noise-canceling |
| Headphone Jack | No Jack |
| Connectivity Technology | Bluetooth |
| Wireless Technology | Bluetooth |
| Bluetooth Version | 5.3 |
| Color | Black |
| Style Name | E18Black |
| Unit Count | 1 Count |
| Brand | Monster |
| Ear Placement | Open Ear |
| Form Factor | Open ear |
| Item Weight | 0.25 lbs (110 grams) |
What's in the box
User Manual
Who Should Buy?
-
Fitness Enthusiasts
These headphones are waterproof and designed for running, making them ideal for active users looking for durability.
-
Commuters
Bluetooth connectivity and long playtime allow for convenient listening during long commutes without constant charging.
-
Outdoor Workers
Clear talk feature and immersive sound make them suitable for outdoor environments where vocal clarity is essential.
-
Audiophiles
Individuals seeking the highest audio fidelity may find the sound quality lacking compared to premium over-ear headphones.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
How long is the battery life?
Answer: The earbuds offer a total battery life of 30 hours with the charging case, and each use lasts up to 6 hours. -
Question:
Are these headphones suitable for outdoor activities?
Answer: Yes, the IPX5 water-resistant rating protects them from sweat and rain, making them perfect for outdoor use. -
Question:
How does the AI noise cancellation feature work?
Answer: The AI noise cancellation technology monitors the surroundings and produces an opposite signal to reduce background noise for clearer audio.
Monster Open-Ear Headphones E18 Editorial Review
** Monster Open Free AC100 Open Ear Headphones** The Monster Open Free AC100 headphones have captured the attention of users with their remarkable balance of performance, design, and value. Many customers appreciate the comfort and lightweight nature of these open-ear headphones, making them ideal for sport enthusiasts and everyday use alike. Users have noted the impressive audio quality, reporting immersive sound and satisfactory volume levels. The dual large drivers enhance the listening experience, delivering clear and enjoyable audio suitable for various settings. For specific purposes like sports, these headphones shine, as they allow users to remain aware of their surroundings while exercising. This feature was particularly praised by active individuals and parents who prefer a more secure fit without sacrificing their ability to communicate with others or be aware of their environment. However, it’s worth noting that not everyone has had a flawless experience. Some users encountered defects, leading to issues such as charging problems. A particular complaint about the high cost of return shipping has left certain customers frustrated, impacting their overall satisfaction with the product. While the microphone quality has received some criticism—especially for making calls or video conferencing—the enduring positive feedback regarding sound quality and fit may outweigh these concerns for many users. In summary, the Monster Open Free AC100 offers excellent sound and comfort, especially for active users, but potential buyers should be cautious about the possibility of receiving defective units and Consider their specific use-case needs regarding microphone quality. **
Customer Reviews & Ratings
18 customers ratings
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5 Star
64%
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4 Star
12%
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3 Star
0%
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2 Star
20%
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1 Star
4%
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Pros
- Excellent sound quality from dual large drivers
- Comfortable and lightweight design
- Good battery life with up to 30 hours of playtime
- Open-ear design allows for situational awareness
- Ideal for sports and outdoor activities
Cons
- Potential for defective units
Platform Trust & Buyer Confidence
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Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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23 July 2026 · via Trustpilot
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Important information
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TTD 189
Order now and get it around Thursday, August 13
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
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Features & Benefits
- 16mm large dynamic driver for superior sound quality and powerful bass.
- AI noise cancellation filters out up to 99% of ambient noise.
- Open-ear design enhances comfort, perfect for long listening sessions.
- Bluetooth 5.3 technology ensures stable wireless connectivity.
- IPX5 water-resistant for sweat and rain, ideal for workouts.
- Impressive 30-hour battery life for uninterrupted music enjoyment.
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Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.