Review on 📻 GUANDA TECHNOLOGIES CO., LTD. Bluetooth FM Transmitter In-Car Wireless Radio Adapter Kit with 1.8" Color Display, Handsfree Call, AUX In/Out, SD/TF Card, USB Charger QC3.0 - Compatible with All Smartphones and Audio Players by Keith Harris

For those of us who drive cars without upgraded computer systems for Aux and USB ports, this is a must have. I've used wired versions of radio transmitters in the past and they work but are very static and require regular frequency changes for a stronger signal if you encounter interference. The signal of this transmitter is very strong and also the blue connection with a smartphone or tablet is stable and strong. My audio is crystal clear and doesn't seem to pick up any interference. It is also very durable and will not fall out of the connector. Haven't used the USB charge/data ports yet, but they are intact and should work. I've only had the device for a few days, but I'm already satisfied. I hope it lasts long!