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๐ง Elevate your sound, stay aware, and never miss a beat with Open Free AC100!
The Monster Open Free AC100 are open-ear, Bluetooth 5.3 wireless headphones designed for professionals and active millennials seeking comfort and clarity. Featuring dual 16mm drivers for immersive stereo sound, AI noise-canceling tech for clear calls, and a robust 30-hour battery life, these waterproof sport earbuds combine cutting-edge audio performance with all-day wearability and seamless connectivity.

















| ASIN | B0D2HS2JCX |
| Additional Features | Fast Charging |
| Age Range Description | Adult |
| Antenna Location | Running, Music |
| Audio Driver Size | 16 Millimeters |
| Audio Driver Type | Dynamic Driver |
| Battery Average Life | 30 Hours |
| Best Sellers Rank | #113,372 in Electronics ( See Top 100 in Electronics ) #7,593 in In-Ear Headphones |
| Bluetooth Range | 10 Meters |
| Bluetooth Version | 5.3 |
| Brand | Monster |
| Built-In Media | User Manual |
| Cable Features | Without Cable |
| Carrying Case Material | Plastic |
| Color | Black |
| Colour | Black |
| Compatible Devices | Bluetooth-enabled devices |
| Connectivity Technology | Wireless |
| Control Method | Remote |
| Control Type | Media Control |
| Customer Package Type | FFP |
| Customer Reviews | 3.9 out of 5 stars 772 Reviews |
| Ear placement | Open Ear |
| Earpiece Shape | Open Ear |
| Enclosure Material | Silicone Plastic Thermoplastic Elastomer (TPE) |
| Form factor | Open Ear |
| Frequency Range | 20 Hz - 20,000 Hz |
| Headphone Folding Features | Open Ear |
| Headphone Jack | Without Jack |
| Headphone jack | Without Jack |
| Headphones Ear Placement | Open Ear |
| Is Autographed | No |
| Manufacturer | Monster |
| Model Name | monster_open_free_ac100 |
| Model Number | MH22156 |
| Noise Control | Active Noise Cancellation |
| Noise control | Active Noise Cancellation |
| Number of Items | 1 |
| Series Number | 22156 |
| Specific Uses For Product | Sport |
| Style Name | black |
| UPC | 810079701032 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |
| Wireless Technology | Bluetooth |
A**O
Sounds great, does not hurt ears, battery life could be better.
I live this head set, works great without bugging my ears, only down side it only last just under 3 hrs for constant usage.
L**A
No complaints! Get them !
These headphones are perfect for when you want to listen to music or talk but also be aware of your surroundings. These earphones also donโt go in your ear so you no longer have to worry about painful ears like with other ear buds. Even with everything said above they are noise cancelling in terms of unwanted noise. They are super comfy and do everything Monster says and more. 10/10
M**O
I recommend these
These are easy to pair with multiple devices. They stay where you want and let you still hear if someone is talking to you. They are very comfortable and the sound is amazing.
J**N
Edited
I'm actually going to rewrite this review. I work out a lot huge part of my life which makes headsets a huge part of my life. This headset has really grown on me and I will tell you why. First of all, with a headset like this, you lose low end on your sound. However, now my only experiences with this brand. They actually put out a really good amount of volume for what they are. Now here's the part that has grown on me. They stay perfectly in place and that is very enjoyable when you have been adjusting earbuds and headsets for decades. I didn't think I would like these that much but they just are very hassle-free and it's nice to be able to hear things around you. Kind of interesting how when you keep using something you can find out you like it better.
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.
Trustpilot
2 weeks ago
1 month ago