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

Works really well with my Bose headphones. It's as if it's part of the headphones. Great quality, easy to use and pair. I use my old wired Bose phones for cutting the grass (and now listening to tunes while doing it)! Once you get used to where the buttons are, it's easy to turn on/off, volume... I only use for a few hours a week, but can't remember the last time I charged it, so I'm quite happy with the battery life.

Honestly, one of the best little gadget I’ve found in a long time. Works really well honestly. I love how seemingly it switches devices. Also, battery life is pretty good. Last me the entire day while studying.

I'm pretty used to Bluetooth headphones sounding like mud. The aptX sound quality on this was a noticeable improvement over previous adapters I've used. It fits well on the QC25s and looks appropriate, and makes a worthwhile upgrade for these headphones.There are some mechanical design issues that could use improvement. It's difficult to distinguish the buttons by touch, you have start from the bottom and count one-two-three. Makes it hard when you want to quickly reach the play/pause button. This would be improved if they made the play-pause button stick out more to provide a landmark.Another awkward feature is the USB port, it's located so that it can't be charged while the adapter is connected to the headphones, so you have to remove the adapter each time it needs charging.

What a brilliant ingenious product that has brought new life to my Bose QC 25’s. Whoever thought of this is a genius. They provide exactly the sort of Bluetooth connectivity needed for these older headphones. I usually use the headphones when I’m flying to cut out the noise of the engines, but often move around or stand up, and the cord gets snagged, which is how annoying. This device now prevents that from happening and I’m using it in conjunction with a small Bluetooth transmitter that connects into the headphone output jack in the planes. Definitely recommended for those that are not ready to upgrade yet.

PRO:-Audio is good when it connects correctly. I was able to successfully get aptX and ACC codecs to stream from my iMac and ACC codec from iPhone.-Physically seats well to the QC25.-Reconnecting to paired devices after turning off and back on is instant.-Price is great.-Can connect simultaneously to two iPhones (6 and 8- Bluetooth v4.2 and 5.0)CONS: [there's a lot]-mic is sub par. On the iphones, coworkers complained of not being able to hear me very well.-Why they block the usb charging port, so that you need to remove it from the headset to charge is a mystery and a pain.-The buttons are close together and don't have unique discernible tactile markings, so it's difficult to use without looking at them. After a little bit of usage you know what they do and you can figure it out, but a raised bump on the play button would have been nice.-Pairing two devices is not intuitive- read the instructions!-When this connects with SBC codec the audio is TERRIBLE. Sounds like a tin can. Mic is equally awful. This only happened when connecting to my iMac and Macbook Air, and only when actively using the Mic. When just streaming audio only, it reverts to ACC codec and sounds great.-Because Apple downgrades the codec to SBC when the Mic is active (in both Bluetooth 4.0 and 5.0, in my testing) and this device is so terrible with that codec, this is not useable for conference calls, webex, zoom, etc. I still use it, but have to switch the Mac to use the internal mic on the Mac, and then just listen on the headset. This means I can't get up to walk and talk, which isn't a problem when using the web cam but on audio only calls from my computer this is a shortcoming, as I sometimes like to get up to pace/talk.

Great upgrade for my old Bose headphones - pairs easily and I haven’t experienced any connection issues- reasonable battery life

Bought this to watch my LG TV and not disturb my wife. It pairs but then looses the connections with the TV. Every mring I go through teh same routine of turning teh TV and unit on and off, deleting the device, repairing and maybe 25% of the time I am successful. I give up and am returning it. Its a great idea and a way to avoid paying $200 for a new set of Bose headphones but it just did not work for me. The seller provided only online support with FAQ. No real help

With so many devices with different inputs, this is a lifesaver. Worked perfectly with little setup effort. Highly recommend. Basically made older Bose headphones workable with new tech. 10/10