Review on Upgrade Your Ride With Criacr Bluetooth FM Transmitter: Dual USB Charging, Hands-Free Calling & MP3 Music Player by Nick Kussmaul

I'm very happy with this transmitter. The sound quality is very clear, with no interference or background hum (once you find the right channel to use in your area). Previous devices would generate feedback, just from plugging them in, even no audio was being played. This device is silent, when you are not playing anything on your device. Charging ports work great.My only complaints, which are small and not worth striking a star:I leave the transmitter at it's top volume, then control playback volume from my phone and radio controls. This means it will yell "Waiting for pairing." when you start the car.When clicking "accept call" from my phone, the call does not default to playing through bluetooth, to my radio, but instead plays through the phone, itself, meaning I have to scramble to select speaker and then choose the bluetooth device. I need to try answering from the phone button on the transmitter, to see if that solves the problem.