Review on 🚗 Upgraded Version Bluetooth 5.0 Car Adapter with FM Transmitter by NECESPOW - MP3 Player, Wireless Radio Receiver Car Kit with 39W USB-C PD+QC3.0 Hands-Free Car Charger, AUX/TF Card/U-Disk Support by Thomas Henry

This product represents excellent value for money when it works. Not sure if double loss AAC is converted from/to mic in/aux out which will seriously degrade the sound quality. The company didn't provide part numbers so I don't know the DAC specs. USC PD charges the iPhone up to 20W, ie up to 80% from 0% in 30 minutes. Until Apple releases a software update, this is the fastest charge rate available. The device integrates FM transmission, AUX output, Mic, USB PD, USB QC, 1 amp USB, TF card and USB flash drive in one small device. I have a problem with the USB and Aux layout, you need free space around the device. Also with a very long voice sequence that plays when trying to connect to the phone every time the car is started. You'll also need a ground loop isolator if you're using the auxiliary output to filter out noise. Be prepared to shell out $10 for one if you use AUX. Blue light tires the eyes, green or warm white is best.