I wanted to share my feedback on the Roav SmartCharge F0 AK-R5113111 FM Transmitter/Bluetooth Receiver/Car Charger with Bluetooth 4.2, 2 USB Ports, PowerIQ, and AUX Output.
I had a surprisingly excellent experience with this. I say surprisingly because the last time I used an FM transmitter, the noise and interference was very frustrating. I rarely experienced it with this device and when I did, I changed the channel and everything went well.
This device came in very handy on my trip from California to Arizona. I was in my Honda Accord with no AUX, BT, etc. I then remembered that I had the Roav Transmitter in my computer bag. Popped it in and was able to enjoy YouTube music throughout the trip. The phone quality is also excellent.
I haven't had any drawbacks come up yet. The charging works well too (tested on my Oneplus 6).
For the size and price, I think it's an excellent device and it's become an essential for my car.