YOCOWOCOUpgraded Wireless Bluetooth 5.0 Adapter for Bose QuietComfort QC 25 with aptX/Mic/Volume Control, Black

Everything feature this product offers, they are all great. The microphone audio quality is great, the battery is amazing, the fit is good. And it fills in a gap, so we don't have to replace out entire headphones just because they are not being wireless.

Good quality. Connectivity is great. Minimalist look

Sound quality: Excellent, no perceivable loss of quality.Battery life and charging: Reasonable. A single charge lasts most of a day if used constantly and the device charges quickly.Usability: Fits snugly onto the left headphone casing and stays securely in place. Easy enough to memorize the positions and functions of the four buttons (on/off, play/stop/repair, volume up and volume down).Microphone: Poor. Too quiet and the sound is muffled.Connectivity: The audio glitches when connected to two devices, so frequent and annoying removal and repairing is required if you listen on more than one device. Also, there seems to be a physical connection issue in that sometimes it only connects the left cup. However, this is easily solved by unplugging and replugging it until it connects properly.Value for money: Good now that the price has been reduced to £26.99 (I paid £46.99).

I was sitting at home a week before a long haul flight and realised that my phone didn't have a jackplug and that playing music to my now, oldish but still great Bose headphones, would be impossible as they don't have bluetooth. A long search revealed lots of bluetooth converters which were quite bulky but had great battery life. I then came across the YOCOWOCO Bluetooth adapter. After looking at similar products I decided to go for the 5.0 of the YOCOWOCO (stupid name!). I'm glad I did. Not only is it a great fit for the headphones and looks just like the existing headphone casing but it also works really well. Battery life is acceptable - who listens to headphones for 6 hours at a time anyway - and the recharge rate is pretty quick. I didn't hear any interference with other bluetooth devices around me on the flight and the sound quality is great. I was sceptical before I bought the adapter but am now the happy owner of bluetooth compatible headphones. A great product!

I've had my Bose QC25 for a lot of years now. Superb headphones, but I was starting to have Bluetooth Envy towards owners of the current wireless versions. No more! The adapter fits tightly to the earpiece profile, is easy to pair, and sounds as it should, no obvious change. It also fits in the case when still fitted - good news. The only two 'negatives' I have are small. It needs to be charged, and sadly the cable entry is not quite in the right place to be able to charge it while fitted to the headphones. It has to be taken off. I see a different version has the charge socket in the end of the adapter, which is better. The other thing is that the control buttons on the device are very low profile, and not so easy to identify by touch alone. It's going to make for fumbling until get used to them. Apart from that the 'phones' have a new life

I bought this a while back as at the time I was using bose qc25 noise cancelling headphones, in my opinion one of the best noise cancelling headphone on the market at the time , loved them so much but wanted bluetooth capability as most of my new devices didn't have headphone jack anymore, had held off long enough trying to use adapters, so before I would fork out alot of money to me for new headphones I gave this a go, thought it might give my headphone a new lease of life as I have taken go care of them and they looked like new , anyway received YOCOWOCO upgraded adapter for qc25, opened the box charged the device and then popped them into the qc25 headphones and I got sound through only 1 ear , tried taking the adapter out and putting back in quite a few time managed to get the sound in both ears but the singer on all tracks was super faint and garbled.I would not recommend these to anyone, i would say try another brand of adapter but might be by the time you get one to work you could have bought new bluetooth headphones.

Actually this seems nicely made and packed. Fits well too.So why is it going back? Well the designer lacks any concept of sense or ergonomics. The micro-USB port of blocked when it is installed on headphones - so it has to be removed every time it needs charging.While this might not seem too onerous it just means endless plugging and unplugging will greatly enhance opportunity's for wear/damage etc. I see no other comments on this line so mebbe it's just me being bugged by it. I mean, just why make it this way.Most of these appear to come out of the same factory so i guess they may all suffer same idiocy.Pity I really wanted this product - and to save a few hundred notes getting a new pair - oh well.

Bose QC25 Headphones were available for a lot less than the QC35's with built in bluetooth and so I decided to buy QC25s and a separate bluetooth adaptor for the times I needed to use them without a cable. This particular adaptor cost less than other, similar, adaptors on Amazon but looks identical and works very well. I could notice no difference in sound quality between using the adaptor and listening on someone else's QC35's. Also, the adaptor fits well onto the Headphones and looks very much a part of them rather than alternative options which have a dangling cable. In one of the other reviews someone comments that if 2 bluetooth devices are within range you can get glitches in the sound, I too experienced this problem but, once one is switched off, it is not an issue. Battery life seems good from my early experience. Overall an excellent alternative to paying a lot more for built in bluetooth.