Review on Ultimate Wireless Bluetooth Aux Car Adapter: Portable Mini Music Receiver Transmitter with Mic & Hands-Free Calling - Home Stereo, Car Audio, Headset, TV, Fast Charging by Josh Long

I wanted to play my iPhone's music streaming service through an old stereo system without built-in Bluetooth. Just plug this little device into the 'Aux In' jack, switch the source to 'Aux' and like magic my old radio is now Bluetooth compatible and I can stream great music effortlessly. Fantastic product and cheap too. This is the winner.