Bluetooth Aux Adapter -Wireless Aux Adapter ,KOOPAO Bluetooth Car Receiver USB to 3.5mm Jack Bluetooth Car kit Audio Receiver with Built-in Mic for Car Speaker Home Audio

We share cars between family members and there is a constant 'Bluetooth battle' going with kids hijacking the default parents Bluetooth (which is a pain to change back). This little device solves it! It switches on when USB power comes on, and a paired phone will connect automatically. Audio quality is excellent - the same as the onboard Bluetooth. Apparently you can pair 2 phones but haven't tried that yet. Great device for a good price. Look no further if you are in the market for a car Bluetooth device that connects to aux.

Simple device, but it turns on and works instantly. Highly recommended

So far this has been what I wanted, connects as soon as you get in your car unlike some other ones I have seen and the sound quality is better then an aux cord to my surprise.