KuulaaBluetooth 5.0 Aux Car Adapter, Wireless 3.5mm Auxiliary Audio Receiver, Light Blue, 12H Playtime, Hands-Free Calls & Voice Notifications

First impressions are that this device is worth every penny, under £10 to upgrade a car radio to Bluetooth streaming and calling. You couldn’t beat it. The audio plays through all the speakers in the car. And phone calls are good quality also. Much cheaper and quicker than an upgraded car radio. Very easy to work and quick to connect. Audio replays automatically after a phone call.

This little thing is very impressive for its size and price. I can't even complain about the audio quality - it manages perfectly in my case.As usual with these Chinese manufacturers, they have stolen a startup sound (in this case, it's the log in sound from Windows 8) and added a very cringe-worthy status voice. But after that, it's a perfect little addition to a car with an aux port but no Bluetooth.

I got this for my E90 3 series that has Bluetooth for phone but not audio, along with a usb cigarette lighter adapter.It works pretty well, it’s not 100% seamless as sometimes the phone hasn’t connected to it - but it does switch between audio via this and calls via the car fine, so for a tenner I cannot complain.

Delighted to get this as my new phone has no 3.5mm audio jack. Ran straight to the van to install it in the USB port, and it didn't fit. Pulled it out and the outer shell of the stick came off. It will now fit without the cover. Update: after using for 30 minutes, I can confirm the sound quality is poor also

Turned an old, redundant Aux-in Sony speaker which had great sound but no Wi-fi capability into a superb Bluetooth sound source for my Man shed. You need USB for the power source, but I had old USB cables and redundant USB transformers aplenty knocking around, so no problem. Other reviewers have mentioned degradation in sound quality, but I haven’t experienced any at all. Good product.