Monster
Monster Open Free AC100
Monster Open Free AC100
Monster Open Free AC100 Open Ear Bluetooth 5.3 Headphones, Wireless Earbuds with Earhooks, Immersive Stereo Sound by 16mm Large Driver, Clear Calls, 30H Playtime, for Workout, Black
Hongfang Zhang
I bought these open-ear headphones as a gift for my son, and he really likes them. The design looks modern and stylish, and the rose-gold color is especially nice. He says they are comfortable to wear and likes being able to hear his surroundings while listening to music. The sound quality is also clear and enjoyable. Overall, I’m very happy with this purchase, and my son loves his new headphones!
Mark
This Bluetooth headset features an excellent design; it hooks directly onto the ear, making it comfortable to wear and unlikely to get lost. It also offers long standby time and good sound quality.
Aylin
I’m really happy with these Monster open-ear headphones. They fit very well around my ears and feel secure without being uncomfortable. Even after wearing them for a while, they don’t hurt or put too much pressure on my ears, which is something I really appreciate.
The sound quality is also very good. The audio comes through clear and sounds great for music, calls, and everyday use. I also like the open-ear design because it feels comfortable and practical while still providing a good listening experience.
They come with a charging case and charging cable, and the overall design looks modern and stylish. Overall, they’re comfortable, easy to wear, and have great sound quality. I’m very satisfied with them.
Eli
Están hermosos muy bueno sonido me siento muy contante con mi compra
Girart
I have been using the Monster Open Ear AC210 Headphones for several days now and am thoroughly impressed with their overall performance. These Bluetooth 5.4 open-ear earbuds offer a practical combination of comfort and situational awareness. During my daily morning walks, I was able to enjoy music and podcasts clearly while still hearing traffic and ambient sounds around me — a safety advantage I really value.
The open-ear design rests securely on the ears with no pressure or discomfort, even after several hours of continuous wear. Bluetooth connectivity is stable, pairing quickly and maintaining a strong connection without dropouts. Sound quality is clear and well-balanced for daily use, with decent stereo separation. While it does not provide the rich depth, bass, or fine detail found in more expensive premium headphones, it is very good for the price and perfectly suitable for music, podcasts, and phone calls.
Battery life has been excellent, consistently delivering close to the advertised 30 hours of playback. Type-C charging is fast and convenient, and the IPX5 waterproof rating gives me confidence to use them during light workouts or in light rain.
In summary, the Monster Open Ear AC210 delivers strong comfort, functionality, and value. I would comfortably recommend these open-ear wireless earbuds to anyone looking for reliable everyday headphones without blocking out the world around them.
Grace wu
My boyfriend ear hole is relatively large, and the in-ear type is not tight enough, and it is easy to lose. The design of this plug-in is very good, comfortable to wear, and the call is also very clear.
Maria
Sadly I got a defective pair. The right earbud won't hook to the box and won't charge making it useless. Tried to return them, but the shipping cost is around 70 usd and I would only get 20 usd back, so not worth it.
I don't recomend the product
Gabriel Salazar
They're just amazing, the sound quality is just great! Also the fact that you can hear background sounds while you're riding your bicycle is just fantastic because of security.
Amber
These are by far the most superior pair of headphones ive ever used. Battery life, is good, i use one at a time so if it dies I just switch them and it recharges in the case. Love that.
The sound on these bad boys is top tier.
Im so sad bc my right one went missing yesterday and I just found it in the bottom of my washing machine 😭
Time to order a new set!
JESSIKA
Beautiful pair of headphones. I’ve been wanting some open ear headphones for a while. finally bought some because these are stunning in-person. They are a bit loose on my hears but I have small ears. The sounds quality is fine, I adjusted my equalizer in Spotify to get the perfect sound. There was a coupon promotion when I ordered these so I am satisfied with the price. Very easy to setup and the instruction manual is straightforward in how to use and connect them with the various control functions.
Mecalie poling
I got these on sale for 30 something dollars. for the $100+ they were originally i figured the sound quality would be better, the notification noises they make for low battery and Bluetooth connectivity confirmation are kinda weird and really show the low quality of the headphones the case is also cheap and not durable feeling. If these were actually 30$ head phones I would expect this, and give it five stars but because they were advertised for $100+ dollars I’m giving 2.
Alana
Had these for less than 45 days and already one of the earbuds won’t charge in the case. Either I got a faulty set or they are garbage. For the price, really disappointing. And the sound quality wasn’t even that great anyway. Totally non-functional with just one.
Cristine
These wireless earphones are my absolute favorite. So much in fact, that I ordered a second pair for back up! I have an ear condition where anything I put in or over my ear gives me vertigo! I am always on the hunt for super light weight ear phones and these were exactly what I needed! They are super lightweight and comfortable, I don't even feel them on! The sound quality is amazing and voice calls come in really clear. As for the battery, surprisingly after a full charge, they lasted about 7 hours. The case is a charger as well. If you have that fully charged, they will charge the earphones without having to plug in! I highly recommend these earphones to anyone that likes to feel like they don't have earphones on. They sit over your ear and wrap around the back of your ear, so they are hidden as well. Also, I love that they came in rose gold, which is my absolute favorite!
Therealniya.P
The speaker is very loud, it’s plays music well no static or sounding like it’s in the water. The battery life is good as well and it can connect to two phones at once. Definitely worth the price
jaimeavasquez
Shay
The sound is nice, richer than I had expected and the fact that u can pair it with another one easily to create a stereo listening experience is awesome. Great deal too!
traci taylor
Bought this speaker and after a week, i decided to return. The sound wasnt as crisp as i was wanting and there are issues with the volume. it goes from low to medium and no in-between. I am going back to my canz Bluetooth speaker because i can control the volume from my smart phone.
mike
I like that its compact and has good sound for the compact size.
Danica
Marek
Sound is Amazing so I ordered another one to share with love ones.
HOTBOY JOSHUA
I always love your brand I always got good outcomes from yall keep it up
Michael Groves
The sound quality is awesome and has bass like you won't believe for such small speakers. It's like having mini subwoofers in a portable device. You have nothing to lose by trying it, if you don't like it send it back no questions asked just like it's advertised. You will like it and be surprised on how it sounds. I bought the smaller one and it sounds so good I just had to buy the bigger one!!! I gave the small one to my son who's reaction was just like mine "WHAT" then I bought this bigger one and no complaints here!!
Customer
Hey, for the price, these are great little speakers. Easy navigating the buttons, its size makes portability a non-issue, sound quality is on benchmark, and functionality meets or exceeds expectations within its class. One could shop around for a white whale deal.... Just stop here.
Jose sanchez
Great product always had monster products love it keep doing what you doing boys
nelson estupinian
Size not too big no too small
Sione
Super surprised how much sound comes out of something so small and it really clear. Love it!
Customer
Wow, very impressed with this Speaker.
It holds a charge for many many hrs! Get it and enjoy!!
Jose
Love the sound from a small speaker.
Samarth J.
Had been in the market for portable bluetooth speakers and now I can safely say that I found what I was looking for. These speakers have an amazing sound and can fill the room very quickly. The lanyard makes the speaker easier to carry and take everywhere. In additional, the vertical orientation allows to place the speaker at various locations quickly without a big footprint. The buttons are self explanatory and easy to use with an easy connection to bluetooth compatible devices. These have my recommendation.
Coolest In Cambridge
I had not really thought about Monster as anything but a legendary maker of premium cables and connectivity hardware. But I picked up the S310 because I wanted something really portable for the back yard this summer. In fact, the convenient wristband caught my attention. Often I'm going downstairs with items for the grill or beverages and don't have a free hand for a Bluetooth speaker. So the carrying strap was a really useful feature. But I am getting ahead of myself.
I'm very pleased with this little speaker. Here are the highlights:
1) It paired with my phone immediately.
2) It connects very quickly.
3) The sound quality is much better than I would expect with such a small speaker system. It fills my back yard with clear and full sound. It stays clean near to the very top of its volume range. There is indeed bass, even in such a small driver. Well, actually, there are 2 drivers and a passive radiator. Certainly it is not earth shaking bass. That is just not physically possible from such a compact unit, but the build quality is sufficient to deliver low end to the soundstage. The documentation states that Monster's audio legend, Noel Lee, personally designed and tuned this little guy. It's well-balanced and clean sound gives me no reason to doubt this claim.
4) Battery life is impressive so far. After giving it a complete charge, I've been using it for at least 12 hours (of music, not standby) without a recharge at a decent volume.
5) Speakerphone mode is actually pretty good. I have another, more expensive Bluetooth speaker with a speakerphone mode and my callers complain that I sound like I'm in a closet. I did not have that experience with the S310. People could hear me and I was not the least bit embarrassed to use it.
5) Water resistance is something I have yet to really test. I'm just too chicken to let a nice piece of electronics get wet. It does have a rubber seal to protect the power port and SD slot.
6) Oh yeah, the SD card slot. This is not a feature I would use but I could certainly see how it might come in handy. For example, you could load up a card of kids music and let them enjoy it without having to use your phone or give them a tablet. Also, if, heaven forbid, you find yourself without WiFi or a cellular signal, you can still enjoy dozens of hours of music.
7) I don't have 2 of these, but if I did, you can pair them so that they will work as left and right channels and double your power. I may take advantage of that.
8) The only feature missing, and maybe I'm old fashioned, is a an 3.5 mm aux input. I hardly ever use one of those old things, but I find the a comfort nonetheless. Ah well.
While this is about the size of less expensive Bluetooth speakers, you really get what you pay for with the Monster S310. It is a small but loyal audio companion.
