The Second Generation Aftershokz Bluez

Member of the AppleVis Editorial Team

Review Category: 


What Are Aftershokz?

Aftershokz  makes headphones designed to rest in front of your ears, conducting sound through your cheekbones. This lets you turn them up without risking your hearing, and hear sounds around you since your headphones are not blocking your ears. The company offers two types, one wired, and one bluetooth. There are two generations of the bluetooth model. The first generation has been reviewed already, but the second generation is new and in limited supply for the moment. I have a set, though, and I want to tell you what I think of it.

Update on January 20, 2015: To my knowledge, the bluetooth Aftershokz are no longer in short supply.

Compared to the Previous Model

If you do not have a set of the first-generation Bluez, skip this section. If you do have them, here are some points comparing the two models.

  • The sound transducers are a bit larger.
  • The electronics are in the right arm of the headset, not the back headband, This lets the band flex a bit more with no problems, and improves the connection quality. The controls are also easier to reach.
  • The left transducer still has its triangular button, but the right one has no buttons at all.
  • Instead of an on/off switch, there is now a button you hold in for a few seconds to turn the unit on and off, placed on the underside of the right arm.
  • Two equalizer options now exist, though I find it hard to tell the difference between the two. (Note: in the latest model, as of January 2015, these equalizer options appear to be gone.)
  • Instead of holding down the volume buttons to skip forward or backward, you press the left-hand triangular button multiple times. This is similar to how other remotes, like Apple's own EarPods, work. However, the Bluez do not offer a "skip back" function; pressing the button three times will just skip forward, then pause.
  • The sound has improved. It sounds a bit better to the user, and also leaks less, so people around you will not hear as much of your audio.

The Good

Bone conduction is perfect for hearing traffic and other ambient sounds while still hearing your book, GPS, podcast, phone call, or other audio. Having a wireless connection to your audio is even better, eliminating the bother of getting wires tangled up in your cane, coat, backpack, purse, or dog leash. The Aftershokz can go very loud if necessary, and they include a volume control, so you can adjust the volume without touching your iPhone or other device. This model also includes microphones, so you can talk to Siri, make phone calls, and so on.

The second-generation Bluez hold their connection very well. The previous model had a lot of problems in that area, disconnecting or playing broken audio much of the time. Now, though, they hold their connection just fine. I have little experience with other bluetooth headsets, but if I can have constant, high-quality audio with no breaks or drops, that's good enough for me.

As mentioned in the last section, the electronics have moved. They are in the sides of the device, leaving the headband in the back free to flex. Many users reported that they kept breaking their Bluez, and most of the time it was because the inflexible band in the back moved too much. This is no longer a problem. The band is meant to bend some, both when putting on or taking off the Bluez, and because people have different-size heads.

This generation added a second microphone, so that the quality of your voice on phone calls is improved. I am unsure exactly how well this works, as I am rarely on the receiving end of a call from a set of Bluez, but other people who use the Bluez say the quality is better. It is worth mentioning, however, that I am asked to repeat myself on phone calls with some frequency when I use the Bluez, yet I am never asked to do so when I use my iPhone on its own.

The Bluez can even talk. Notifications about the connection status (whether the headset is in pairing mode or has connected) are spoken, as is a message to "charge me" when you have only minutes of battery left. After the Bluez have not played any audio for a while, pressing a volume button will speak the battery level (in the previous generation, the battery level was spoken when you turned the unit off; that is no longer the case). There is also an LED indicator, but the spoken messages are a great feature I wish more headsets and other devices would incorporate. As of January 2015, the Bluez will even tell you "device 1 connected" when they connect to the first device with which they were paired. I am not certain, but I imagine "device 2", "device 3", and so on would be spoken, letting you know which of your devices the Bluez has connected with.

The charger is a standard micro USB, and works with wall chargers, car chargers, computers… Anything that can provide power to a USB device, essentially; I just use a spare iPhone charger, which works perfectly. On a charge, I can easily get a day of use, sometimes two days, depending on how much I use them.

I'll mention Siri access in this section, because the way it works has changed. In the first generation of the Bluez, Siri was access by holding in the left button for a couple seconds. In the first model of the second generation, you would have to wait twenty seconds after all sound stopped playing (VoiceOver speech included) to do this, as pressing and holding the button during or just after playback would switch between the two equalizer settings. Fortunately, in the latest revision of the Bluez (january 2015), the company seems to have done away with the equalizer. I can once again hold in the left button for two seconds to access Siri, no matter how recently media was playing. To test this, I even used the button during playback, and siri interrupted the music, just as I hoped it would.

The Bad

I find this generation to be horribly uncomfortable. I realize that the comfort level of any headset is very subjective, but when I can wear the first generation Bluez for hours and forget I have them on, yet cannot wear this new model for more than an hour at a time, that is a problem. The main issue seems to be the arms that extend forward along the sides of the device, connecting the rear headband to the sound transducers. I find that these arms press very hard into the sides of my head, just above and behind my ears. I recently got a new pair of Aftershokz, and the part of my head where the rear of each arm rests feels bruised.

The transducers themselves do not sit flat, but rather angle outward at the front. It is almost as though the band along the back of the Bluez is a bit too small, causing the whole headset to angle outward at the front instead of resting flat or angling slightly inward as I believe it should. Again, the fit and comfort of any headset will vary from person to person. Still, if you are thinking of buying these, see if you can get an in-person demo first to check how well they fit you.

I also find that the Siri interface disappears. For instance, I tell Siri to text someone, then do a two-finger double tap after it asks me if I want to send, so I can review the message. Seconds after I do this, Siri vanishes, as does my message. I have not yet found this problem to occur when I do not have the Bluez connected, but it is likely an iOS problem that could happen with any headset. Again, I have no other bluetooth headsets to use for comparison.

Siri's audio will switch to phone-quality, instead of using A2DP like most audio does. I have no idea why; I asked Aftershokz about this way back in December of 2013, but have yet to hear an answer. Dictation will do a similar thing, dropping back to the low-quality audio you get with phone calls. While I don't find that speech recognition is less accurate, environmental noise notwithstanding, I do find that listening to Siri's responses is a bit annoying at such a low quality.

Update: December 2014

After more use, I have found Siri commands to be understood far less frequently while the Bluez are the audio source, and I find myself rarely using Siri unless I don't have the Bluez on.

The bigger problem is that, only eight months after I got my headset, it is already broken. The fit was never great, as I not only said here but also told Aftershokz, and now I'm seeing the results. The right arm has come loose from the plastic band; it is not yet swinging on its wires, but I think it would be if I used the Bluez much more. I'm not surprised, and Aftershokz is replacing my unit, but I did warn them that the fit was extremely snug and that I needed a larger size. If they still lack different sizes, I have a feeling my replacement set will go the way of my current one within months, simply because I don't have a tiny head.

Update: January 2015

My replacement has arrived. It is nice to have the updated firmware, but the fit is even tighter than my last set. I'll use this set as long as I can, but unless something changes, I might just seek a refund once these break (and with how tight they are, they will break).

The Bottom Line

As a concept, the Aftershokz technology is wonderful. Headphones that don't cover your ears at all, and that are wireless to boot. The first generation was plagued with connection problems and structural failures, leading to the re-designed current generation. While this new model does a great job of addressing the faults of its predecessor, it introduces problems of its own. If Aftershokz could somehow put the controls and comfort of the old model into the form factor of the new, we'd have a real winner.

Do I recommend these headphones? If you are not going to wear them for a long time and don't need constant access to Siri, and you want a stereo bluetooth headset that still lets you hear your environment, yes. At around $100, though, think carefully about your particular use case and be sure this headset is best. If you will be using it for an extended period and have a head that is even slightly larger than average, or need to be sure no one can overhear you (even the new model leaks some sound), or if you will be somewhere where hearing your surroundings doesn't matter much, you might not benefit from the Bluez enough to justify the cost.

One thing I do have to say is that the customer service is great. I've emailed Aftershokz several times, and they are always quick to respond. They also monitor their Twitter account,  @Aftershokz.  When I got my first generation Bluez in December of 2013, I emailed them about all the problems I was having (mostly the poor connection and sound leaking). They promptly added me to the list of people who would receive a second-generation Bluez, free of charge, and even let me keep my original model. When I had to request a replacement in December of 2014, they responded the same day I sent the email, and I had my replacement set within three weeks.

They are also aware of the blindness community. Originally, they offered the manuals for their devices in PDF format only, but once they were informed that PDFs are difficult to read with screen readers, they responded. You can now find text-only manuals for their products on their website (there's a link on that page that specifically says "Bluez II Accessible User Guide"). They also made the controls on some of their headphone models easier to feel based on user feedback. Aftershokz seems to be a great company, and I am happy doing business with them. I just wish they would put more thought into their design and ergonomics. No matter how good your product is, if it hurts to wear and breaks every year because the fit is far too tight, that's a problem. Obviously, the fit will be different for everyone, but I can't be the only one having this particular issue.

Devices Accessory Was Used With: 

iPod Touch


3 Stars


The review on this page has generously been submitted by a member of the AppleVis community. As AppleVis is a community-powered website, we make no guarantee, either express or implied, of the accuracy or completeness of the information contained in this review.


Good review, thanks.

Thank you for a good, informative review. I hope to receive my Bluez tomorrow:)
The reason of low quality audio is due to the codec bluetooth uses. to stream audio to phone. Every time phone requests microphone to be opened (siri, dictation, phone call,,, ptt apps etc) it switches to that profile and audio quality drops to unacceptably low levels. Unfortunately, as you said, Apple has forgot to send the "Close the microphone" command to the devices, so it thinks that it still has to transmit audio and doesn't switch back to media playback profile. The same bug causes the dictation microphone left open after dictating, and causes some battery life loss on your device. Some find a workaround when triggering siri and terminating it immediately solve this issue temporarily.

thanks for this review, I was

thanks for this review, I was browsing around for info on the revised model before ordering, I use my two sets of the older generation primarily for work where I hae them on for 8 to 10 hours at a time, this is the second review where I come across info on this unit to be uncomfortable to wear for extended use. I'll stick to my older units for a while.

Nice review

Thanks for the review. I have both the 1st and 2nd generation Bluez and have to agree with everything in this review. I have not experienced the discomfort that most have reported, but to be fair, I have a small head. They do definitely have a tighter squeeze to them so I can see why people are complaining. The 1st gen Bluez always moved around on me and the 2nd gen Bluez fit me pretty well. When I first started wearing them,I had some mild discomfort with the weight of the transducer arms pushing down on my ears. Small head plus small ears means I don't have a lot of space behind my ears where the arms of the headset tend to settle, so it pushes my ears away from my head a bit. This was sore at first, but I guess I got used to it because I wear them all day at work and don't have any problems now. I do appreciate the improvement in sound leakage. I couldn't use my 1st gen set at work because people outside my office were hearing VO and whatever I happened to be listening to. Now I have had no complaints about the new ones and I can tell a noticeable difference in the sound leakage level. I don't like the controls nearly as well as the 1st gen Bluez, but it's not a deal breaker for me. I don't use Siri much as I find using a Braille display with my phone to be more convenient. Connectivity is much improved. I really couldn't use the first gen Bluez for calls because of the connection quality and I was getting too much breakup. I haven't had any trouble using the 2nd gen set on calls and no one has commented that they couldn't hear or understand me. The sound quality for music is much better as well. I didn't like listening to music on my old Bluez and stuck mainly to books and podcasts. The new Bluez have more bass and while not as good as earbuds, the sound quality for music is good enough that I don't mind using them for music anymore. All in all, I'd say the second gen Bluez are worth upgrading to if you can get around the discomfort. Try some on before buying if it's an option and be particularly cautious if you have a large head.

Why not just hold the home button down when we want to use Siri?

Why not just hold the home button for siri? I know that when we buy things, we usually want them to work the way we want them to.but if were using our hand to hold the button down on the headset, why not just use the same hand to hold down the button on the iPhone?

That will work, but…

Member of the AppleVis Editorial Team

Of course, the home button is always going to work, and anything else is a convenience. However, part of the reason for getting bluetooth headphones is so you can leave your device tucked in a case, pocket, or bag and still hear audio or take phone calls. Not being able to operate Siri, at least not easily, is a loss of the convenience touted by Aftershokz. I realize that this makes people sound lazy, but consider: the Bluez are water-resistant, and if it's raining, or snowy, or you might drop your phone due to wearing gloves, it's much safer and easier to press a big button on the side of your head than fumble out your phone, find and press the home button, and then shove your phone back into its safe spot.

Bluetooth headphones

A friend of mine had me try a bluetooth headset yesterday before an indy car race. Anyway, Siri switches to phone quality with those headsets. I think it is something to do with the bluetooth switching to what it uses during phone calls. I will probably be getting a pair of these to use outside.

Any lag with voiceover?


Is there any lag when using these with voiceover? Also, what version of Bluetooth is used? Is there hd voice compatibility with calls?


Member of the AppleVis Editorial Team

As with all bluetooth audio devices, there is a very small lag. This will be present no matter what bluetooth device you use, so long as it uses A2DP (that is, high-quality audio). I believe the Aftershokz use bluetooth 2.0 still. I have no information on HQ voice calls, sorry.

Some lag

There is a little bit of lag. The only time I really notice it though is when I'm typing on the on-screen keyboard.

For me, thats major

For me, the minor lag can be pretty major as it slows my typing down.

I want to go wireless, but just don't think its ready for primetime. I am one of those voiceover users who uses earpods all the time. Going from that to Bluetooth becomes difficult because I can really notice the difference and it makes doings things so awkward for me.

I agree with Vash's post. I

I agree with Vash's post. I just don't bluetooth is ready for everything yet. Personally, I'm thinking of buying the wired aftershokz headphones. From what I've read, even the wired headphones need to be charged, because the transducers still need power to run, apparently.

You get used to the slight lag

Member of the AppleVis Editorial Team

There is a slight lag, definitely. After a while, though, you stop noticing it and can get by just fine. Yes, it's nice to return to wired headphones, but for the amazing convenience of having no wires… Well, for me at least, trading my wires for a small lag is worth it. To each their own; my point is simply that you should try it for a few days to see if you can get by, instead of assuming the lag will be too much. It will be for some, but you won't know unless you try.

Also disappointed; but concept good

Meghcap: Thanks for another great review and/or guide. I learn so much from all of your insightful posts. I have purchased every model of the Aftershokz since version 1.0 which was wired, and I use the wired version mostly because of the many deficiencies you indicated in your review of the latest bluez. I cannot imagine that this company is the only game in town offering bone conduction headphones -- there are some models on Amazon and I purchased a rather uncomfortable pair from Sendero a number of years ago. Does anyone have experience with other manufacturers of bone conduction headphones? I would surely pay more for better quality and comfort. Bluetooth, of course, would be the best.

New trekz titanium version of Aftershockz

Have a look at the new Aftershokz Trekz Titanium version. They are an upgrade of the blues in every way... The lag is far shorter, the sound quality is better, there is less noise spill and for me the best improvement is the fit. As they are titanium they have more give and can be adjusted to fit much easier. I have a larger than average head and struggled with the blues and couldn't bend the plastic and so they got uncomfortable quickly but with these I can get them to fit perfectly.


I was looking at them but the blues2s were cheaper so I got them and am looking for text instructions.