I bought this item for my father as modern phones don't have an aux port. I told my father about the existence of the comically named "double key" and said I would buy him one. He struggled to play music in his car. He usually plugged a USB stick into his stereo, but this music didn't satisfy him. He wanted to play it from his phone but his system isn't Bluetooth compatible. Note: This is the system installed on his 2007 Dodge Magnum. I helped him understand the concept of a double key and install it in his car. He can now play audio from his phone in the car and still charge his phone instead of having to choose between the two. The only issue I noticed, but I'm not entirely sure who's to blame, is that the cable we plugged in to check charging wasn't fully connected to the port on the dongle. I'm also not sure if it was a cable or a dongle, but it was "slow loading". Next time I'll test a fast charge cable and update the review when I do. Otherwise, I think it's a solid buy. Only gave it 4 stars just to be reasonable considering it isn't perfect and can't be "perfect".
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