So, got this last night and was extremely glad it and the cable I purchased enabled me to use my phone GPS.  Since I am an electrician by trade, I decided to make sure it was adequately constructed prior to using it since a lot of my fellow customers seemed to have an issue with the screw cap falling off and getting stuck in the outlet.  So far, not had an issue with that and it seems put together well.I can attest that the blue LED is extremely bright, but luckily my outlet is located inside the center console of my car so I can't see it when driving. 

Question: Do I have to use my phone?
Answer: can attest that the blue LED is extremely bright