It’s pretty much plug and play. My phone found it without pressing any buttons to start pairing process. Tried it on my car and it works without issues. it uses FM but it is certainly good enough. Fast charging works like a charm so I can use it to charge my phone or charge the Sat Nav. The light colour can be changed by the way. IMHO blue looks better. It's quite small but has many functions on it. It can convert Bluetooth connection to FM transmitter, then you can enjoy your music from the radio. apart from FM transmitter, it also can turn your radio into a hands-free phone system, you can answer the phone call by pressing the button on it. It can support QC, my phone can be charged in full much quicker than the existing USB port in the car. it is easy to use and set up without much technical skills required. It adds much more functions into the entertainment of the old car. wonderful product, small size but powerful features.