








🎶 Hear more, miss less — the open-ear audio game-changer!
The MonsterOpen Free AC100 are open-ear Bluetooth 5.3 wireless earbuds featuring dual 16mm drivers for immersive stereo sound, AI-powered noise cancellation, and a remarkable 30-hour battery life. Designed with earhooks for secure fit and waterproofing for active lifestyles, these earbuds deliver crystal-clear calls and ambient awareness, perfect for professionals on the move.

















| ASIN | B0D2HS2JCX |
| Audio Driver Size | 16 Millimeters |
| Audio Driver Type | Dynamic Driver |
| Batteries | 3 Lithium Polymer batteries required. (included) |
| Battery Life | 30 Hours |
| Best Sellers Rank | #40,076 in Electronics ( See Top 100 in Electronics ) #478 in Open-Ear Headphones |
| Bluetooth Range | 10 Meters |
| Bluetooth Version | 5.3 |
| Cable Feature | Without Cable |
| Compatible Devices | Bluetooth-enabled devices |
| Connectivity Technology | Wireless |
| Control Method | Remote |
| Control Type | Media Control |
| Customer Package Type | FFP |
| Customer Reviews | 3.8 3.8 out of 5 stars (557) |
| Date First Available | April 23, 2024 |
| Earpiece Shape | earhook |
| Hardware Interface | Bluetooth |
| Headphones Jack | No Jack |
| Input Device Interface | Bluetooth |
| Item Weight | 6.7 ounces |
| Item model number | MH22156 |
| Manufacturer | Monster |
| Model Name | monster_open_free_ac100 |
| Noise Control Features | active_noise_cancellation |
| Package Dimensions | 5.24 x 4.49 x 1.93 inches |
| Series Number | 22156 |
| Special Feature | Fast Charging |
| Style | black |
| Supports Bluetooth Technology | Yes |
| UPC | 810079701032 |
| Units | 1.0 Count |
| Water Resistance Level | Waterproof |
| Wireless Communication Technology | Bluetooth |
S**C
Great product
Works really well. The sound quality is excellent, and I like Open Free, so you can hear the surroundings.
R**H
Much better than earbuds
Comfortanle to wear with good sound quality
C**A
Not good at all even on sale
Wow, these are the worst. The fact that these are originally 129 is crazy. I feel like I over paid with the crazy sale price. They feel super cheap the voice quality is terrible and the music quality is even worse. I get they are open early, but I expect more from Monster. Cannot recommend.
J**S
Well made!
These are well made and work well. My only issue is that it is too large for my ears and often fall off. But the sound is impeccable. It was easy to connect to my phone. Charge lasts a long time.
T**S
they "work"
you could never convince me these are 130 normal price bought it on the infamous amazon sale for 30 the only reason this gets 3 stars is the fact i bought it for 30. the sound quality for talking isnt great my raycons and even the phone itself has a better mic. but i bought these cause they wrap around the ear and they do stay on so thats good. sound quality while listening to music isnt great not enough base but its not completely horrible either well unless your an audiophile but your not getting these anyway if you are lol and idk if its the phone or the ear buds but ive never had this problem with my raycons the audio randomly boosting and dropping? but yeah overall would not get again but since i have them ill use them cause they work they dont fall off and i still gotta test the noise cancelation on the mic cause if that works well then i dont have a pair that can do that and im pretty happy cause that was the main reason i jumped in on these... not happy enough to raise the stars but happy enough xD
R**S
Great headphones
These are great headphones! They are very easy to use. The directions were easy to understand and follow. Connected easily to my phone. Held charge for quite some time. Not much background noise. The quality of the music is superb. Great quality for a cheaper price point. Highly recommend.
S**N
Long lasting, great quality, and comfortable
Love these! I have small ears and struggle with finding in-ear ear buds that fit. I have hours of conference calls a day and over the ear headphones just make my ears sweat. However, these are the perfect! They fit nicely on my ears and are really comfortable. The sound quality and audio is great. And the battery lasts a long time. Great value for the money as well.
B**3
They produce sound
The description says clear audio, deep base, every aspect of sound is crisp and brought to life. None of that is true for my experience. No bass. Audio is fuzzy and not pleasant. And in the 10 minutes I used them, they disconnected from each other and then my phone. I agree with another review saying that these are sub 20$ earbuds. To me they belong in an "impulse buy" section by the register at a gas station. They do produce sound.
A**O
I live this head set, works great without bugging my ears, only down side it only last just under 3 hrs for constant usage.
J**S
No more ear pain, easy to use, connect immediately. The case is a bit big but makes sense the way these are designed. Good sound, love wearing these on my morning walks.
A**R
These headphones were comfortable and sound was decent for outdoors sporting activities, BUT then the batteries failed after a few months! It quickly drains and does not recharge!! Monster Warranty says "Customers located outside of U.S. will be responsible for all shipping costs. A processing fee may apply to all warranty claims."
S**N
Bon produit, le son est bon et aucun problème dans les oreilles léger et pas encombrant je les recommande
P**S
Je les porte pour la course et ils sont tellement confortable que j’en oubli leur présence. Ils tiennent en position sur l’oreille même avec des chocs intense et répété. La finition est excellente et l’autonomie parfaite. Cependant il faut garder son téléphone proche car le son plante si trop loin. Le tactile des écouteur est agréable.
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